# Changelog

A summary of changes in the Jupyter notebook. For more detailed
information, see [GitHub](https://github.com/jupyter/notebook).

Use `pip install notebook --upgrade` or `conda upgrade notebook` to
upgrade to the latest release.

We strongly recommend that you upgrade pip to version 9+ of pip before
upgrading `notebook`.

Use `pip install pip --upgrade` to upgrade pip. Check pip version with
`pip --version`.

<!-- <START NEW CHANGELOG ENTRY> -->

## 6.4.11

([Full Changelog](https://github.com/jupyter/notebook/compare/6.4.10...3911672959fcd35cf4a1b1ad7c9c8a5651c17ae6))

### Bugs fixed

- Update further to ipykernel comm refactoring [#6358](https://github.com/jupyter/notebook/pull/6358) ([@echarles](https://github.com/echarles))

### Maintenance and upkeep improvements

- Add testpath to the test dependencies. [#6357](https://github.com/jupyter/notebook/pull/6357) ([@echarles](https://github.com/echarles))
- Temporary workaround to fix js-tests related to sanitizer js loading by phantomjs [#6356](https://github.com/jupyter/notebook/pull/6356) ([@echarles](https://github.com/echarles))
- Use place-hold.it instead of plaecehold.it to create image placeholders [#6320](https://github.com/jupyter/notebook/pull/6320) ([@echarles](https://github.com/echarles))
- Migrate to python 3.7+ [#6260](https://github.com/jupyter/notebook/pull/6260) - Fixes [#6256](https://github.com/jupyter/notebook/pull/6256) ([@penguinolog](https://github.com/penguinolog))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2022-03-15&to=2022-04-18&type=c))

[@blink1073](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ablink1073+updated%3A2022-03-15..2022-04-18&type=Issues) | [@echarles](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Aecharles+updated%3A2022-03-15..2022-04-18&type=Issues) | [@fcollonval](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Afcollonval+updated%3A2022-03-15..2022-04-18&type=Issues) | [@github-actions](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Agithub-actions+updated%3A2022-03-15..2022-04-18&type=Issues) | [@jtpio](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ajtpio+updated%3A2022-03-15..2022-04-18&type=Issues) | [@penguinolog](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Apenguinolog+updated%3A2022-03-15..2022-04-18&type=Issues)

<!-- <END NEW CHANGELOG ENTRY> -->

## 6.4.9

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.7...9e3a7001117e64a24ead07b888bd055fdd66faf3))

### Maintenance and upkeep improvements

- Update links and fix check-release [#6310](https://github.com/jupyter/notebook/pull/6310) ([@blink1073](https://github.com/blink1073))
- Update 6.4.x branch with some missing commits [#6308](https://github.com/jupyter/notebook/pull/6308) ([@kycutler](https://github.com/kycutler))

### Other merged PRs

- Specify minimum version of nbconvert required [#6286](https://github.com/jupyter/notebook/pull/6286) ([@adamjstewart](https://github.com/adamjstewart))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2022-01-12&to=2022-03-14&type=c))

[@adamjstewart](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Aadamjstewart+updated%3A2022-01-12..2022-03-14&type=Issues) | [@blink1073](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ablink1073+updated%3A2022-01-12..2022-03-14&type=Issues) | [@github-actions](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Agithub-actions+updated%3A2022-01-12..2022-03-14&type=Issues) | [@jtpio](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ajtpio+updated%3A2022-01-12..2022-03-14&type=Issues) | [@kevin-bates](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Akevin-bates+updated%3A2022-01-12..2022-03-14&type=Issues) | [@kycutler](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Akycutler+updated%3A2022-01-12..2022-03-14&type=Issues) | [@Zsailer](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3AZsailer+updated%3A2022-01-12..2022-03-14&type=Issues)

## 6.4.8

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.7...479902d83a691253e0cff8439a33577e82408317))

### Bugs fixed

- Fix to remove potential memory leak on Jupyter Notebooks ZMQChannelHandler code [#6251](https://github.com/jupyter/notebook/pull/6251) ([@Vishwajeet0510](https://github.com/Vishwajeet0510))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2022-01-12&to=2022-01-25&type=c))

[@Vishwajeet0510](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3AVishwajeet0510+updated%3A2022-01-12..2022-01-25&type=Issues)

## 6.4.7

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.6...b77b5e38b8fa1a20150d7fa4d735dbf1c4f00418))

### Bugs fixed

- Fix Chinese punctuation [#6268](https://github.com/jupyter/notebook/pull/6268) ([@LiHua-Official](https://github.com/LiHua-Official))
- Add date field to kernel message header [#6265](https://github.com/jupyter/notebook/pull/6265) ([@kevin-bates](https://github.com/kevin-bates))
- Fix deprecation warning [#6253](https://github.com/jupyter/notebook/pull/6253) ([@tornaria](https://github.com/tornaria))

### Maintenance and upkeep improvements

- Enforce labels on PRs [#6235](https://github.com/jupyter/notebook/pull/6235) ([@blink1073](https://github.com/blink1073))
- Fix: CI error for python 3.6 & macOS [#6215](https://github.com/jupyter/notebook/pull/6215) ([@penguinolog](https://github.com/penguinolog))

### Other merged PRs

- handle KeyError when get session [#6245](https://github.com/jupyter/notebook/pull/6245) ([@ccw630](https://github.com/ccw630))
- Updated doc for passwd [#6209](https://github.com/jupyter/notebook/pull/6209) ([@antoinecarme](https://github.com/antoinecarme))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-11-16&to=2022-01-12&type=c))

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## 6.4.6

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.5...160c27d3c23dafe8b42240571db21b0d5cbae2fe))

### Bugs fixed

- Fix `asyncio` error when opening notebooks [#6221](https://github.com/jupyter/notebook/pull/6221) ([@dleen](https://github.com/dleen))
- Change to use a universal Chinese translation on certain words [#6218](https://github.com/jupyter/notebook/pull/6218) ([@jackexu](https://github.com/jackexu))
- Fix Chinese translation typo [#6211](https://github.com/jupyter/notebook/pull/6211) ([@maliubiao](https://github.com/maliubiao)
- Fix `send2trash` tests failing on Windows [#6127](https://github.com/jupyter/notebook/pull/6127) ([@dolfinus](https://github.com/dolfinus))

### Maintenance and upkeep improvements

- TST: don't look in user site for serverextensions [#6233](https://github.com/jupyter/notebook/pull/6233) ([@bnavigator](https://github.com/bnavigator))
- Enable terminal tests as `pywinpty` is ported for python 3.9 [#6228](https://github.com/jupyter/notebook/pull/6228) ([@nsait-linaro](https://github.com/nsait-linaro))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-10-19&to=2021-11-16&type=c))

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## 6.4.5

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.4...ccd9665571107e02a325a738b8baebd6532b2d3d))

### Bug fixes

- Recover from failure to render mimetype [#6181](https://github.com/jupyter/notebook/pull/6181) ([@martinRenou](https://github.com/martinRenou))

### Maintenance and upkeep improvements

- Fix crypto handling [#6197](https://github.com/jupyter/notebook/pull/6197) ([@blink1073](https://github.com/blink1073))
- Fix `jupyter_client` warning [#6178](https://github.com/jupyter/notebook/pull/6178) ([@martinRenou](https://github.com/martinRenou))

### Documentation improvements

- Fix nbsphinx settings [#6200](https://github.com/jupyter/notebook/pull/6200) ([@mgeier](https://github.com/mgeier))
- Fully revert the pinning of `nbsphinx` to 0.8.6 [#6201](https://github.com/jupyter/notebook/pull/6201) ([@kevin-bates](https://github.com/kevin-bates))
- Pin `nbsphinx` to 0.8.6, clean up orphaned resources [#6194](https://github.com/jupyter/notebook/pull/6194) ([@kevin-bates](https://github.com/kevin-bates))
- Fix typo in docstring [#6188](https://github.com/jupyter/notebook/pull/6188) ([@jgarte](https://github.com/jgarte))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-09-03&to=2021-10-19&type=c))

[@blink1073](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ablink1073+updated%3A2021-09-03..2021-10-19&type=Issues) | [@jgarte](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ajgarte+updated%3A2021-09-03..2021-10-19&type=Issues) | [@kevin-bates](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Akevin-bates+updated%3A2021-09-03..2021-10-19&type=Issues) | [@martinRenou](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3AmartinRenou+updated%3A2021-09-03..2021-10-19&type=Issues) | [@mgeier](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Amgeier+updated%3A2021-09-03..2021-10-19&type=Issues)

## 6.4.4

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.3...c06c340574e1d2207940c5bd1190eb73d82ab945))

### Documentation improvements

- Update Manual Release Instructions [#6152](https://github.com/jupyter/notebook/pull/6152) ([@blink1073](https://github.com/blink1073))

### Other merged PRs

- Use default JupyterLab CSS sanitizer options for Markdown [#6160](https://github.com/jupyter/notebook/pull/6160) ([@krassowski](https://github.com/krassowski))
- Fix syntax highlight [#6128](https://github.com/jupyter/notebook/pull/6128) ([@massongit](https://github.com/massongit))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-08-11&to=2021-09-03&type=c))

[@blink1073](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ablink1073+updated%3A2021-08-11..2021-09-03&type=Issues) | [@kevin-bates](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Akevin-bates+updated%3A2021-08-11..2021-09-03&type=Issues) | [@krassowski](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Akrassowski+updated%3A2021-08-11..2021-09-03&type=Issues) | [@massongit](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Amassongit+updated%3A2021-08-11..2021-09-03&type=Issues) | [@minrk](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Aminrk+updated%3A2021-08-11..2021-09-03&type=Issues) | [@Zsailer](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3AZsailer+updated%3A2021-08-11..2021-09-03&type=Issues)

## 6.4.3

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.2...c373bd89adaaddffbb71747ebbcfe8a749cae0a8))

### Bugs fixed

- Add @babel/core dependency [#6133](https://github.com/jupyter/notebook/pull/6133) ([@afshin](https://github.com/afshin))
- Switch webpack to production mode [#6131](https://github.com/jupyter/notebook/pull/6131) ([@afshin](https://github.com/afshin))

### Maintenance and upkeep improvements

- Clean up link checking [#6130](https://github.com/jupyter/notebook/pull/6130) ([@blink1073](https://github.com/blink1073))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-08-06&to=2021-08-10&type=c))

[@afshin](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Aafshin+updated%3A2021-08-06..2021-08-10&type=Issues) | [@blink1073](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3Ablink1073+updated%3A2021-08-06..2021-08-10&type=Issues) | [@Zsailer](https://github.com/search?q=repo%3Ajupyter%2Fnotebook+involves%3AZsailer+updated%3A2021-08-06..2021-08-10&type=Issues)

## 6.4.2

([Full Changelog](https://github.com/jupyter/notebook/compare/v6.4.0...999e8322bcd24e0ed62b180c19ec13db3f48165b))

### Bugs fixed

- Add missing file to manifest [#6122](https://github.com/jupyter/notebook/pull/6122) ([@afshin](https://github.com/afshin))
- Fix issue #3218 [#6108](https://github.com/jupyter/notebook/pull/6108) ([@Nazeeh21](https://github.com/Nazeeh21))
- Fix version of jupyter-packaging in pyproject.toml [#6101](https://github.com/jupyter/notebook/pull/6101) ([@frenzymadness](https://github.com/frenzymadness))
- "#element".tooltip is not a function on home page fixed. [#6070](https://github.com/jupyter/notebook/pull/6070) ([@ilayh123](https://github.com/ilayh123))

### Maintenance and upkeep improvements

- Enhancements to the desktop entry [#6099](https://github.com/jupyter/notebook/pull/6099) ([@Amr-Ibra](https://github.com/Amr-Ibra))
- Add missing spaces to help messages in config file [#6085](https://github.com/jupyter/notebook/pull/6085) ([@saiwing-yeung](https://github.com/saiwing-yeung))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-05-17&to=2021-08-06&type=c))

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## 6.4.0

([Full Changelog](https://github.com/jupyter/notebook/compare/6.3.0...80eb286f316838afc76a9a84b06f54e7dccb6c86))

### Bugs fixed

- Fix Handling of Encoded Paths in Save As Dialog [#6030](https://github.com/jupyter/notebook/pull/6030) ([@afshin](https://github.com/afshin))
- Fix: split_cell doesn't always split cell [#6017](https://github.com/jupyter/notebook/pull/6017) ([@gamestrRUS](https://github.com/gamestrRUS))
- Correct 'Content-Type' headers [#6026](https://github.com/jupyter/notebook/pull/6026) ([@faucct](https://github.com/faucct))
- Fix skipped tests & remove deprecation warnings [#6018](https://github.com/jupyter/notebook/pull/6018) ([@befeleme](https://github.com/befeleme))
- [Gateway] Track only this server's kernels [#5980](https://github.com/jupyter/notebook/pull/5980) ([@kevin-bates](https://github.com/kevin-bates))
- Bind the HTTPServer in start [#6061](https://github.com/jupyter/notebook/pull/6061)

### Maintenance and upkeep improvements

- Revert "do not apply asyncio patch for tornado >=6.1" [#6052](https://github.com/jupyter/notebook/pull/6052) ([@minrk](https://github.com/minrk))
- Use Jupyter Releaser [#6048](https://github.com/jupyter/notebook/pull/6048) ([@afshin](https://github.com/afshin))
- Add Workflow Permissions for Lock Bot [#6042](https://github.com/jupyter/notebook/pull/6042) ([@jtpio](https://github.com/jtpio))
- Fixes related to the recent changes in the documentation [#6021](https://github.com/jupyter/notebook/pull/6021) ([@frenzymadness](https://github.com/frenzymadness))
- Add maths checks in CSS reference test [#6035](https://github.com/jupyter/notebook/pull/6035) ([@stef4k](https://github.com/stef4k))
- Add Issue Lock and Answered Bots [#6019](https://github.com/jupyter/notebook/pull/6019) ([@afshin](https://github.com/afshin))

### Documentation improvements

- Spelling correction [#6045](https://github.com/jupyter/notebook/pull/6045) ([@wggillen](https://github.com/wggillen))
- Minor typographical and comment changes [#6025](https://github.com/jupyter/notebook/pull/6025) ([@misterhay](https://github.com/misterhay))
- Fixes related to the recent changes in the documentation [#6021](https://github.com/jupyter/notebook/pull/6021) ([@frenzymadness](https://github.com/frenzymadness))
- Fix readthedocs environment [#6020](https://github.com/jupyter/notebook/pull/6020) ([@blink1073](https://github.com/blink1073))

### Contributors to this release

([GitHub contributors page for this release](https://github.com/jupyter/notebook/graphs/contributors?from=2021-03-22&to=2021-05-12&type=c))

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## 6.3.0

### Merged PRs

* Add square logo and desktop entry files [#6010](https://github.com/jupyter/notebook/pull/6010) ([@befeleme](https://github.com/befeleme))
* Modernize Changelog [#6008](https://github.com/jupyter/notebook/pull/6008) ([@afshin](https://github.com/afshin))
* Add missing "import inspect" [#5999](https://github.com/jupyter/notebook/pull/5999) ([@mgeier](https://github.com/mgeier))
* Add Codecov badge to README [#5989](https://github.com/jupyter/notebook/pull/5989) ([@thomasrockhu](https://github.com/thomasrockhu))
* Remove configuration for nosetests from setup.cfg [#5986](https://github.com/jupyter/notebook/pull/5986) ([@frenzymadness](https://github.com/frenzymadness))
* Update security.rst [#5978](https://github.com/jupyter/notebook/pull/5978) ([@dlrice](https://github.com/dlrice))
*  Docs-Translations: Updated Hindi and Chinese Readme.md [#5976](https://github.com/jupyter/notebook/pull/5976) ([@rjn01](https://github.com/rjn01))
* Allow /metrics by default if auth is off [#5974](https://github.com/jupyter/notebook/pull/5974) ([@blairdrummond](https://github.com/blairdrummond))
* Skip terminal tests on Windows 3.9+ (temporary) [#5968](https://github.com/jupyter/notebook/pull/5968) ([@kevin-bates](https://github.com/kevin-bates))
* Update GatewayKernelManager to derive from AsyncMappingKernelManager [#5966](https://github.com/jupyter/notebook/pull/5966) ([@kevin-bates](https://github.com/kevin-bates))
* Drop use of deprecated pyzmq.ioloop [#5965](https://github.com/jupyter/notebook/pull/5965) ([@kevin-bates](https://github.com/kevin-bates))
* Drop support for Python 3.5 [#5962](https://github.com/jupyter/notebook/pull/5962) ([@kevin-bates](https://github.com/kevin-bates))
* Allow jupyter_server-based contents managers in notebook [#5957](https://github.com/jupyter/notebook/pull/5957) ([@afshin](https://github.com/afshin))
* Russian translation fixes [#5954](https://github.com/jupyter/notebook/pull/5954) ([@insolor](https://github.com/insolor))
* Increase culling test idle timeout [#5952](https://github.com/jupyter/notebook/pull/5952) ([@kevin-bates](https://github.com/kevin-bates))
* Re-enable support for answer_yes flag [#5941](https://github.com/jupyter/notebook/pull/5941) ([@afshin](https://github.com/afshin))
* Replace Travis and Appveyor with Github Actions [#5938](https://github.com/jupyter/notebook/pull/5938) ([@kevin-bates](https://github.com/kevin-bates))
* DOC: Server extension, extra docs on configuration/authentication. [#5937](https://github.com/jupyter/notebook/pull/5937) ([@Carreau](https://github.com/Carreau))

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## 6.2.0

## Merged PRs

- Increase minimum tornado version ([5933](https://github.com/jupyter/notebook/pull/5933))
- Adjust skip decorators to avoid remaining dependency on nose ([5932](https://github.com/jupyter/notebook/pull/5932))
- Ensure that cell ids persist after save ([5928](https://github.com/jupyter/notebook/pull/5928))
- Add reconnection to Gateway (form nb2kg) ([5924](https://github.com/jupyter/notebook/pull/5924))
- Fix some typos ([5917](https://github.com/jupyter/notebook/pull/5917))
- Handle TrashPermissionError, now that it exist ([5894](https://github.com/jupyter/notebook/pull/5894))

Thank you to all the contributors:

- @kevin-bates
- @mishaschwartz
- @oyvsyo
- @user202729
- @stefanor

## 6.1.6

## Merged PRs

-  do not require nose for testing ([5826](https://github.com/jupyter/notebook/pull/5826))
- [docs] Update Chinese and Hindi readme.md ([5823](https://github.com/jupyter/notebook/pull/5823))
- Add support for creating terminals via GET ([5813](https://github.com/jupyter/notebook/pull/5813))
- Made doc translations in Hindi and Chinese ([5787](https://github.com/jupyter/notebook/pull/5787))

Thank you to all the contributors:

- @pgajdos
- @rjn01
- @kevin-bates
- @virejdasani

## 6.1.5

6.1.5 is a security release, fixing one vulnerability:

- Fix open redirect vulnerability GHSA-c7vm-f5p4-8fqh (CVE to be assigned)

## 6.1.4

- Fix broken links to jupyter documentation ([5686](https://github.com/jupyter/notebook/pull/5686))
- Add additional entries to troubleshooting section ([5695](https://github.com/jupyter/notebook/pull/5695))
- Revert change in page alignment ([5703](https://github.com/jupyter/notebook/pull/5703))
- Bug fix: remove double encoding in download files ([5720](https://github.com/jupyter/notebook/pull/5720))
- Fix typo for Check in zh_CN ([5730](https://github.com/jupyter/notebook/pull/5730))
- Require a file name in the "Save As" dialog ([5733](https://github.com/jupyter/notebook/pull/5733))

Thank you to all the contributors:

- bdbai
- Jaipreet Singh
- Kevin Bates
- Pavel Panchekha
- Zach Sailer

## 6.1.3

- Title new buttons with label if action undefined ([5676](https://github.com/jupyter/notebook/pull/5676))

Thank you to all the contributors:

- Kyle Kelley

## 6.1.2

- Fix russian message format for delete/duplicate actions ([5662](https://github.com/jupyter/notebook/pull/5662))
- Remove unnecessary import of bind_unix_socket ([5666](https://github.com/jupyter/notebook/pull/5666))
- Tooltip style scope fix ([5672](https://github.com/jupyter/notebook/pull/5672))

Thank you to all the contributors:

- Dmitry Akatov
- Kevin Bates
- Magda Stenius

## 6.1.1

- Prevent inclusion of requests_unixsocket on Windows ([5650](https://github.com/jupyter/notebook/pull/5650))

Thank you to all the contributors:

- Kevin Bates

## 6.1.0

Please note that this repository is currently maintained by a skeleton
crew of maintainers from the Jupyter community. For our approach moving
forward, please see this
[notice](https://github.com/jupyter/notebook#notice) from the README.
Thank you.

Here is an enumeration of changes made since the last release and
included in 6.1.0.

- Remove deprecated encoding parameter for Python 3.9 compatibility. ([5174](https://github.com/jupyter/notebook/pull/5174))
- Add support for async kernel management ([4479](https://github.com/jupyter/notebook/pull/4479))
- Fix typo in password_required help message ([5320](https://github.com/jupyter/notebook/pull/5320))
- Gateway only: Ensure launch and request timeouts are in sync ([5317](https://github.com/jupyter/notebook/pull/5317))
- Update Markdown Cells example to HTML5 video tag ([5411](https://github.com/jupyter/notebook/pull/5411))
- Integrated LoginWidget into edit to enable users to logout from the t... ([5406](https://github.com/jupyter/notebook/pull/5406))
- Update message about minimum Tornado version ([5222](https://github.com/jupyter/notebook/pull/5222))
- Logged notebook type ([5425](https://github.com/jupyter/notebook/pull/5425))
- Added nl language ([5354](https://github.com/jupyter/notebook/pull/5354))
- Add UNIX socket support to notebook server. ([4835](https://github.com/jupyter/notebook/pull/4835))
- Update CodeMirror dependency ([5198](https://github.com/jupyter/notebook/pull/5198))
- Tree added download multiple files ([5351](https://github.com/jupyter/notebook/pull/5351))
- Toolbar buttons tooltip: show help instead of label ([5107](https://github.com/jupyter/notebook/pull/5107))
- Remove unnecessary import of requests_unixsocket ([5451](https://github.com/jupyter/notebook/pull/5451))
- Add ability to cull terminals and track last activity ([5372](https://github.com/jupyter/notebook/pull/5372))
- Code refactoring notebook.js ([5352](https://github.com/jupyter/notebook/pull/5352))
- Install terminado for docs build ([5462](https://github.com/jupyter/notebook/pull/5462))
- Convert notifications JS test to selenium ([5455](https://github.com/jupyter/notebook/pull/5455))
- Add cell attachments to markdown example ([5412](https://github.com/jupyter/notebook/pull/5412))
- Add Japanese document ([5231](https://github.com/jupyter/notebook/pull/5231))
- Migrate Move multiselection test to selenium ([5158](https://github.com/jupyter/notebook/pull/5158))
- Use `cmdtrl-enter` to run a cell ([5120](https://github.com/jupyter/notebook/pull/5120))
- Fix broken "Raw cell MIME type" dialog ([5385](https://github.com/jupyter/notebook/pull/5385))
- Make a notebook writable after successful save-as ([5296](https://github.com/jupyter/notebook/pull/5296))
- Add actual watch script ([4738](https://github.com/jupyter/notebook/pull/4738))
- Added `--autoreload` flag to `NotebookApp` ([4795](https://github.com/jupyter/notebook/pull/4795))
- Enable check_origin on gateway websocket communication ([5471](https://github.com/jupyter/notebook/pull/5471))
- Restore detection of missing terminado package ([5465](https://github.com/jupyter/notebook/pull/5465))
- Culling: ensure `last_activity` attr exists before use ([5355](https://github.com/jupyter/notebook/pull/5355))
- Added functionality to allow filter kernels by Jupyter Enterprise Gat... ([5484](https://github.com/jupyter/notebook/pull/5484))
- 'Play' icon for run-cell toolbar button ([2922](https://github.com/jupyter/notebook/pull/2922))
- Bump minimum version of jQuery to 3.5.0 ([5491](https://github.com/jupyter/notebook/pull/5491))
- Remove old JS markdown tests, add a new one in selenium ([5497](https://github.com/jupyter/notebook/pull/5497))
- Add support for more RTL languages ([5036](https://github.com/jupyter/notebook/pull/5036))
- Make markdown cells stay RTL in edit mode ([5037](https://github.com/jupyter/notebook/pull/5037))
- Unforce RTL output display ([5039](https://github.com/jupyter/notebook/pull/5039))
- Fixed multicursor backspacing ([4880](https://github.com/jupyter/notebook/pull/4880))
- Implemented Split Cell for multicursor ([4824](https://github.com/jupyter/notebook/pull/4824))
- Alignment issue \[FIXED\] ([3173](https://github.com/jupyter/notebook/pull/3173))
- MathJax: Support for `\gdef` ([4407](https://github.com/jupyter/notebook/pull/4407))
- Another (Minor) Duplicate Code Reduction ([5316](https://github.com/jupyter/notebook/pull/5316))
- Update readme regarding maintenance ([5500](https://github.com/jupyter/notebook/pull/5500))
- Document contents chunks ([5508](https://github.com/jupyter/notebook/pull/5508))
- Backspace deletes empty line ([5516](https://github.com/jupyter/notebook/pull/5516))
- The dropdown submenu at notebook page is not keyboard accessible ([4732](https://github.com/jupyter/notebook/pull/4732))
- Tooltips visible through keyboard navigation for specified buttons ([4729](https://github.com/jupyter/notebook/pull/4729))
- Fix for recursive symlink ([4670](https://github.com/jupyter/notebook/pull/4670))
- Fix for the terminal shutdown issue ([4180](https://github.com/jupyter/notebook/pull/4180))
- Add japanese translation files ([4490](https://github.com/jupyter/notebook/pull/4490))
- Workaround for socket permission errors on Cygwin ([4584](https://github.com/jupyter/notebook/pull/4584))
- Implement optional markdown header and footer files ([4043](https://github.com/jupyter/notebook/pull/4043))
- Remove double link when using `custom_display_url` ([5544](https://github.com/jupyter/notebook/pull/5544))
- Respect `cell.is_editable` during find-and-replace ([5545](https://github.com/jupyter/notebook/pull/5545))
- Fix exception causes all over the codebase ([5556](https://github.com/jupyter/notebook/pull/5556)
- Improve login shell heuristics ([5588](https://github.com/jupyter/notebook/pull/5588))
- Added support for `JUPYTER_TOKEN_FILE` ([5587](https://github.com/jupyter/notebook/pull/5587))
- Kill notebook itself when server cull idle kernel ([5593](https://github.com/jupyter/notebook/pull/5593))
- Implement password hashing with bcrypt ([3793](https://github.com/jupyter/notebook/pull/3793))
- Fix broken links ([5600](https://github.com/jupyter/notebook/pull/5600))
- Russian internationalization support ([5571](https://github.com/jupyter/notebook/pull/5571))
- Add a metadata tag to override notebook direction (ltr/rtl) ([5052](https://github.com/jupyter/notebook/pull/5052))
- Paste two images from clipboard in markdown cell ([5598](https://github.com/jupyter/notebook/pull/5598))
- Add keyboard shortcuts to menu dropdowns ([5525](https://github.com/jupyter/notebook/pull/5525))
- Update codemirror to `5.56.0+components1` ([5637](https://github.com/jupyter/notebook/pull/5637))

Thank you to all the contributors:

- Aaron Myatt
- Adam Blake
- Afshin Taylor Darian
- Aman Bansal
- Ben Thayer
- berendjan
- Bruno P. Kinoshita
- bzinberg
- Christophe Cadilhac
- Daiki Katsuragawa
- David Lukes
- Dmitriy Q
- dmpe
- dylanzjy
- dSchurch
- E. M. Bray
- ErwinRussel
- Felix Mönckemeyer
- Grant Nestor
- Jarrad Whitaker
- Jesus Panales Castillo
- Joshua Zeltser
- Karthikeyan Singaravelan
- Kenichi Ito
- Kevin Bates
- Koki Nishihara
- Kris Wilson
- Kyle Kelley
- Laura Merlo
- levinxo
- Luciano Resende
- Luis Cabezon Manchado
- Madhusudhan Srinivasa
- Matthias Geier
- mattn
- Max Klein
- Min RK
- Mingxuan Lin
- Mohammad Mostafa Farzan
- Niko Felger
- Norah Abanumay
- Onno Broekmans
- PierreMB
- pinarkavak
- Ram Rachum
- Reece Hart
- Remi Rampin
- Rohit Sanjay
- Shane Canon
- Simon Li
- Steinar Sturlaugsson
- Steven Silvester
- taohan16
- Thew Dhanat
- Thomas Kluyver
- Toon Baeyens
- Vidar Tonaas Fauske
- Zachary Sailer

## 6.0.3

- Dependency updates to fix startup issues on Windows platform
- Add support for nbconvert 6.x
- Creation of recent tab

Thanks for all the contributors:

- Luciano Resende
- Kevin Bates
- ahangsleben
- Zachary Sailer
- Pallavi Bharadwaj
- Thomas Kluyver
- Min RK
- forest0
- Bibo Hao
- Michal Charemza
- Sergey Shevelev
- Shuichiro MAKIGAKI
- krinsman
- TPartida
- Landen McDonald
- Tres DuBiel

## 6.0.2

- Update JQuery dependency to version 3.4.1 to fix security vulnerability (CVE-2019-11358)
- Update CodeMirror to version 5.48.4 to fix Python formatting issues
- Continue removing obsolete Python 2.x code/dependencies
- Multiple documentation updates

Thanks for all the contributors:

- David Robles
- Jason Grout
- Kerwin Sun
- Kevin Bates
- Kyle Kelley
- Luciano Resende
- Marcus D Sherman
- Sasaki Takeru
- Tom Jarosz
- Vidar Tonaas Fauske
- Wes Turner
- Zachary Sailer

## 6.0.1

- Attempt to re-establish websocket connection to Gateway ([4777](https://github.com/jupyter/notebook/pull/4777))
- Add missing react-dom js to package data ([4772](https://github.com/jupyter/notebook/pull/4772))

Thanks for all the contributors:

- Eunsoo Park
- Min RK

## 6.0

This is the first major release of the Jupyter Notebook since version
5.0 (March 2017).

We encourage users to start trying JupyterLab, which has just announced
it's 1.0 release in preparation for a future transition.

- Remove Python 2.x support in favor of Python 3.5 and higher.
- Multiple accessibility enhancements and bug-fixes.
- Multiple translation enhancements and bug-fixes.
- Remove deprecated ANSI CSS styles.
- Native support to forward requests to Jupyter Gateway(s) (Embedded
    NB2KG).
- Use JavaScript to redirect users to notebook homepage.
- Enhanced SSL/TLS security by using PROTOCOL_TLS which selects the
    highest ssl/tls protocol version available that both the client and
    server support. When PROTOCOL_TLS is not available use
    PROTOCOL_SSLv23.
- Add `?no_track_activity=1` argument to allow API requests. to not be
    registered as activity (e.g. API calls by external activity
    monitors).
- Kernels shutting down due to an idle timeout is no longer considered
    an activity-updating event.
- Further improve compatibility with tornado 6 with improved checks
    for when websockets are closed.
- Launch the browser with a local file which redirects to the server
    address including the authentication token. This prevents another
    logged-in user from stealing the token from command line arguments
    and authenticating to the server. The single-use token previously
    used to mitigate this has been removed. Thanks to Dr. Owain Kenway
    for suggesting the local file approach.
- Respect nbconvert entrypoints as sources for exporters
- Update to CodeMirror to 5.37, which includes f-string syntax for
    Python 3.6.
- Update jquery-ui to 1.12
- Execute cells by clicking icon in input prompt.
- New "Save as" menu option.
- When serving on a loopback interface, protect against DNS rebinding
    by checking the `Host` header from the browser. This check can be
    disabled if necessary by setting `NotebookApp.allow_remote_access`. (Disabled by default while we work out some Mac issues in
    [3754](https://github.com/jupyter/notebook/issues/3754)).
- Add kernel_info_timeout traitlet to enable restarting slow kernels.
- Add `custom_display_host` config option to override displayed URL.
- Add /metrics endpoint for Prometheus Metrics.
- Optimize large file uploads.
- Allow access control headers to be overriden in
    jupyter_notebook_config.py to support greater CORS and proxy
    configuration flexibility.
- Add support for terminals on windows.
- Add a "restart and run all" button to the toolbar.
- Frontend/extension-config: allow default json files in a .d
    directory.
- Allow setting token via jupyter_token env.
- Cull idle kernels using `--MappingKernelManager.cull_idle_timeout`.
- Allow read-only notebooks to be trusted.
- Convert JS tests to Selenium.

Security Fixes included in previous minor releases of Jupyter Notebook
and also included in version 6.0.

- Fix Open Redirect vulnerability (CVE-2019-10255) where certain
    malicious URLs could redirect from the Jupyter login page to a
    malicious site after a successful login.
- Contains a security fix for a cross-site inclusion (XSSI)
    vulnerability (CVE-2019--9644), where files at a known URL could be
    included in a page from an unauthorized website if the user is
    logged into a Jupyter server. The fix involves setting the
    `X-Content-Type-Options: nosniff` header, and applying CSRF checks
    previously on all non-GET API requests to GET requests to API
    endpoints and the /files/ endpoint.
- Check Host header to more securely protect localhost deployments
    from DNS rebinding. This is a pre-emptive measure, not fixing a
    known vulnerability. Use `.NotebookApp.allow_remote_access` and
    `.NotebookApp.local_hostnames` to configure access.
- Upgrade bootstrap to 3.4, fixing an XSS vulnerability, which has
    been assigned
    [CVE-2018-14041](https://nvd.nist.gov/vuln/detail/CVE-2018-14041).
- Contains a security fix preventing malicious directory names from
    being able to execute javascript.
- Contains a security fix preventing nbconvert endpoints from
    executing javascript with access to the server API. CVE request
    pending.

Thanks for all the contributors:

- AAYUSH SINHA
- Aaron Hall, MBA
- Abhinav Sagar
- Adam Rule
- Adeel Ahmad
- Alex Rothberg
- Amy Skerry-Ryan
- Anastasis Germanidis
- Andrés Sánchez
- Arjun Radhakrishna
- Arovit Narula
- Benda Xu
- Björn Grüning
- Brian E. Granger
- Carol Willing
- Celina Kilcrease
- Chris Holdgraf
- Chris Miller
- Ciaran Langton
- Damian Avila
- Dana Lee
- Daniel Farrell
- Daniel Nicolai
- Darío Hereñú
- Dave Aitken
- Dave Foster
- Dave Hirschfeld
- Denis Ledoux
- Dmitry Mikushin
- Dominic Kuang
- Douglas Hanley
- Elliott Sales de Andrade
- Emilio Talamante Lugo
- Eric Perry
- Ethan T. Hendrix
- Evan Van Dam
- Francesco Franchina
- Frédéric Chapoton
- Félix-Antoine Fortin
- Gabriel
- Gabriel Nützi
- Gabriel Ruiz
- Gestalt LUR
- Grant Nestor
- Gustavo Efeiche
- Harsh Vardhan
- Heng GAO
- Hisham Elsheshtawy
- Hong Xu
- Ian Rose
- Ivan Ogasawara
- J Forde
- Jason Grout
- Jessica B. Hamrick
- Jiaqi Liu
- John Emmons
- Josh Barnes
- Karthik Balakrishnan
- Kevin Bates
- Kirit Thadaka
- Kristian Gregorius Hustad
- Kyle Kelley
- Leo Gallucci
- Lilian Besson
- Lucas Seiki Oshiro
- Luciano Resende
- Luis Angel Rodriguez Guerrero
- M Pacer
- Maarten Breddels
- Mac Knight
- Madicken Munk
- Maitiú Ó Ciaráin
- Marc Udoff
- Mathis HAMMEL
- Mathis Rosenhauer
- Matthias Bussonnier
- Matthias Geier
- Max Vovshin
- Maxime Mouchet
- Michael Chirico
- Michael Droettboom
- Michael Heilman
- Michael Scott Cuthbert
- Michal Charemza
- Mike Boyle
- Milos Miljkovic
- Min RK
- Miro Hrončok
- Nicholas Bollweg
- Nitesh Sawant
- Ondrej Jariabka
- Park Hae Jin
- Paul Ivanov
- Paul Masson
- Peter Parente
- Pierre Tholoniat
- Remco Verhoef
- Roland Weber
- Roman Kornev
- Rosa Swaby
- Roy Hyunjin Han
- Sally
- Sam Lau
- Samar Sultan
- Shiti Saxena
- Simon Biggs
- Spencer Park
- Stephen Ward
- Steve (Gadget) Barnes
- Steven Silvester
- Surya Prakash Susarla
- Syed Shah
- Sylvain Corlay
- Thomas Aarholt
- Thomas Kluyver
- Tim
- Tim Head
- Tim Klever
- Tim Metzler
- Todd
- Tom Jorquera
- Tyler Makaro
- Vaibhav Sagar
- Victor
- Vidar Tonaas Fauske
- Vu Minh Tam
- Vít Tuček
- Will Costello
- Will Starms
- William Hosford
- Xiaohan Li
- Yuvi Panda
- ashley teoh
- nullptr

## 5.7.8

- Fix regression in restarting kernels in 5.7.5. The restart handler
    would return before restart was completed.
- Further improve compatibility with tornado 6 with improved checks
    for when websockets are closed.
- Fix regression in 5.7.6 on Windows where .js files could have the
    wrong mime-type.
- Fix Open Redirect vulnerability (CVE-2019-10255) where certain
    malicious URLs could redirect from the Jupyter login page to a
    malicious site after a successful login. 5.7.7 contained only a
    partial fix for this issue.

## 5.7.6

5.7.6 contains a security fix for a cross-site inclusion (XSSI)
vulnerability (CVE-2019--9644), where files at a known URL could be
included in a page from an unauthorized website if the user is logged
into a Jupyter server. The fix involves setting the
`X-Content-Type-Options: nosniff` header, and applying CSRF checks
previously on all non-GET API requests to GET requests to API endpoints
and the /files/ endpoint.

The attacking page is able to access some contents of files when using
Internet Explorer through script errors, but this has not been
demonstrated with other browsers.

## 5.7.5

- Fix compatibility with tornado 6 ([4392](https://github.com/jupyter/notebook/pull/4392), [4449](https://github.com/jupyter/notebook/pull/4449)).
- Fix opening integer filedescriptor during startup on Python 2 ([4349](https://github.com/jupyter/notebook/pull/4349))
- Fix compatibility with asynchronous
    [KernelManager.restart_kernel]{.title-ref} methods ([4412](https://github.com/jupyter/notebook/pull/4412))

## 5.7.4

5.7.4 fixes a bug introduced in 5.7.3, in which the
`list_running_servers()` function attempts to parse HTML files as JSON,
and consequently crashes ([4284](https://github.com/jupyter/notebook/pull/4284)).

## 5.7.3

5.7.3 contains one security improvement and one security fix:

- Launch the browser with a local file which redirects to the server
    address including the authentication token ([4260](https://github.com/jupyter/notebook/pull/4260)). This prevents another logged-in user from stealing
    the token from command line arguments and authenticating to the
    server. The single-use token previously used to mitigate this has
    been removed. Thanks to Dr. Owain Kenway for suggesting the local
    file approach.
- Upgrade bootstrap to 3.4, fixing an XSS vulnerability, which has
    been assigned
    [CVE-2018-14041](https://nvd.nist.gov/vuln/detail/CVE-2018-14041) ([4271](https://github.com/jupyter/notebook/pull/4271)).

## 5.7.2

5.7.2 contains a security fix preventing malicious directory names from
being able to execute javascript. CVE request pending.

## 5.7.1

5.7.1 contains a security fix preventing nbconvert endpoints from
executing javascript with access to the server API. CVE request pending.

## 5.7.0

New features:

- Update to CodeMirror to 5.37, which includes f-string syntax for
    Python 3.6 ([3816](https://github.com/jupyter/notebook/pull/3816))
- Update jquery-ui to 1.12 ([3836](https://github.com/jupyter/notebook/pull/3836))
- Check Host header to more securely protect localhost deployments
    from DNS rebinding. This is a pre-emptive measure, not fixing a
    known vulnerability ([3766](https://github.com/jupyter/notebook/pull/3766)). Use
    `.NotebookApp.allow_remote_access` and
    `.NotebookApp.local_hostnames` to configure access.
- Allow access-control-allow-headers to be overridden ([3886](https://github.com/jupyter/notebook/pull/3886))
- Allow configuring max_body_size and max_buffer_size ([3829](https://github.com/jupyter/notebook/pull/3829))
- Allow configuring get_secure_cookie keyword-args ([3778](https://github.com/jupyter/notebook/pull/3778))
- Respect nbconvert entrypoints as sources for exporters ([3879](https://github.com/jupyter/notebook/pull/3879))
- Include translation sources in source distributions ([3925](https://github.com/jupyter/notebook/pull/3925), [3931](https://github.com/jupyter/notebook/pull/3931))
- Various improvements to documentation ([3799](https://github.com/jupyter/notebook/pull/3799), [3800](https://github.com/jupyter/notebook/pull/3800),
    [3806](https://github.com/jupyter/notebook/pull/3806), [3883](https://github.com/jupyter/notebook/pull/3883), [3908](https://github.com/jupyter/notebook/pull/3908))

Fixing problems:

- Fix breadcrumb link when running with a base url ([3905](https://github.com/jupyter/notebook/pull/3905))
- Fix possible type error when closing activity stream ([3907](https://github.com/jupyter/notebook/pull/3907))
- Disable metadata editing for non-editable cells ([3744](https://github.com/jupyter/notebook/pull/3744))
- Fix some styling and alignment of prompts caused by regressions in
    5.6.0.
- Enter causing page reload in shortcuts editor ([3871](https://github.com/jupyter/notebook/pull/3871))
- Fix uploading to the same file twice ([3712](https://github.com/jupyter/notebook/pull/3712))

See the 5.7 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.7)
involved in this release.

Thanks to the following contributors:

- Aaron Hall
- Benjamin Ragan-Kelley
- Bill Major
- bxy007
- Dave Aitken
- Denis Ledoux
- Félix-Antoine Fortin
- Gabriel
- Grant Nestor
- Kevin Bates
- Kristian Gregorius Hustad
- M Pacer
- Madicken Munk
- Maitiu O Ciarain
- Matthias Bussonnier
- Michael Boyle
- Michael Chirico
- Mokkapati, Praneet(ES)
- Peter Parente
- Sally Wilsak
- Steven Silvester
- Thomas Kluyver
- Walter Martin

## 5.6.0

New features:

- Execute cells by clicking icon in input prompt ([3535](https://github.com/jupyter/notebook/pull/3535), [3687](https://github.com/jupyter/notebook/pull/3687))
- New "Save as" menu option ([3289](https://github.com/jupyter/notebook/pull/3289))
- When serving on a loopback interface, protect against DNS rebinding
    by checking the `Host` header from the browser ([3714](https://github.com/jupyter/notebook/pull/3714)). This check can be
    disabled if necessary by setting `NotebookApp.allow_remote_access`. (Disabled by default while we work out some Mac issues in
    [3754](https://github.com/jupyter/notebook/issues/3754)).
- Add kernel_info_timeout traitlet to enable restarting slow kernels ([3665](https://github.com/jupyter/notebook/pull/3665))
- Add `custom_display_host` config option to override displayed URL ([3668](https://github.com/jupyter/notebook/pull/3668))
- Add /metrics endpoint for Prometheus Metrics ([3490](https://github.com/jupyter/notebook/pull/3490))
- Update to MathJax 2.7.4 ([3751](https://github.com/jupyter/notebook/pull/3751))
- Update to jQuery 3.3 ([3655](https://github.com/jupyter/notebook/pull/3655))
- Update marked to 0.4 ([3686](https://github.com/jupyter/notebook/pull/3686))

Fixing problems:

- Don't duplicate token in displayed URL ([3656](https://github.com/jupyter/notebook/pull/3656))
- Clarify displayed URL when listening on all interfaces ([3703](https://github.com/jupyter/notebook/pull/3703))
- Don't trash non-empty directories on Windows ([3673](https://github.com/jupyter/notebook/pull/3673))
- Include LICENSE file in wheels ([3671](https://github.com/jupyter/notebook/pull/3671))
- Don't show "0 active kernels" when starting the notebook ([3696](https://github.com/jupyter/notebook/pull/3696))

Testing:

- Add find replace test ([3630](https://github.com/jupyter/notebook/pull/3630))
- Selenium test for deleting all cells ([3601](https://github.com/jupyter/notebook/pull/3601))
- Make creating a new notebook more robust ([3726](https://github.com/jupyter/notebook/pull/3726))

Thanks to the following contributors:

- Arovit Narula ([arovit](https://github.com/arovit))
- lucasoshiro ([lucasoshiro](https://github.com/lucasoshiro))
- M Pacer ([mpacer](https://github.com/mpacer))
- Thomas Kluyver ([takluyver](https://github.com/takluyver))
- Todd ([toddrme2178](https://github.com/toddrme2178))
- Yuvi Panda ([yuvipanda](https://github.com/yuvipanda))

See the 5.6 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.6)
involved in this release.

## 5.5.0

New features:

- The files list now shows file sizes ([3539](https://github.com/jupyter/notebook/pull/3539))
- Add a quit button in the dashboard ([3004](https://github.com/jupyter/notebook/pull/3004))
- Display hostname in the terminal when running remotely ([3356](https://github.com/jupyter/notebook/pull/3356), [3593](https://github.com/jupyter/notebook/pull/3593))
- Add slides exportation/download to the menu ([3287](https://github.com/jupyter/notebook/pull/3287))
- Add any extra installed nbconvert exporters to the "Download as"
    menu ([3323](https://github.com/jupyter/notebook/pull/3323))
- Editor: warning when overwriting a file that is modified on disk ([2783](https://github.com/jupyter/notebook/pull/2783))
- Display a warning message if cookies are not enabled ([3511](https://github.com/jupyter/notebook/pull/3511))
- Basic `__version__` reporting for extensions ([3541](https://github.com/jupyter/notebook/pull/3541))
- Add `NotebookApp.terminals_enabled` config option ([3478](https://github.com/jupyter/notebook/pull/3478))
- Make buffer time between last modified on disk and last modified on
    last save configurable ([3273](https://github.com/jupyter/notebook/pull/3273))
- Allow binding custom shortcuts for 'close and halt' ([3314](https://github.com/jupyter/notebook/pull/3314))
- Add description for 'Trusted' notification ([3386](https://github.com/jupyter/notebook/pull/3386))
- Add `settings['activity_sources']` ([3401](https://github.com/jupyter/notebook/pull/3401))
- Add an `output_updated.OutputArea` event ([3560](https://github.com/jupyter/notebook/pull/3560))

Fixing problems:

- Fixes to improve web accessibility ([3507](https://github.com/jupyter/notebook/pull/3507))
- Fixed color contrast issue in tree.less ([3336](https://github.com/jupyter/notebook/pull/3336))
- Allow cancelling upload of large files ([3373](https://github.com/jupyter/notebook/pull/3373))
- Don't clear login cookie on requests without cookie ([3380](https://github.com/jupyter/notebook/pull/3380))
- Don't trash files on different device to home dir on Linux ([3304](https://github.com/jupyter/notebook/pull/3304))
- Clear waiting asterisks when restarting kernel ([3494](https://github.com/jupyter/notebook/pull/3494))
- Fix output prompt when `execution_count` missing ([3236](https://github.com/jupyter/notebook/pull/3236))
- Make the 'changed on disk' dialog work when displayed twice ([3589](https://github.com/jupyter/notebook/pull/3589))
- Fix going back to root directory with history in notebook list ([3411](https://github.com/jupyter/notebook/pull/3411))
- Allow defining keyboard shortcuts for missing actions ([3561](https://github.com/jupyter/notebook/pull/3561))
- Prevent default on pageup/pagedown when completer is active ([3500](https://github.com/jupyter/notebook/pull/3500))
- Prevent default event handling on new terminal ([3497](https://github.com/jupyter/notebook/pull/3497))
- ConfigManager should not write out default values found in the .d
    directory ([3485](https://github.com/jupyter/notebook/pull/3485))
- Fix leak of iopub object in activity monitoring ([3424](https://github.com/jupyter/notebook/pull/3424))
- Javascript lint in notebooklist.js ([3409](https://github.com/jupyter/notebook/pull/3409))
- Some Javascript syntax fixes ([3294](https://github.com/jupyter/notebook/pull/3294))
- Convert native for loop to `Array.forEach()` ([3477](https://github.com/jupyter/notebook/pull/3477))
- Disable cache when downloading nbconvert output ([3484](https://github.com/jupyter/notebook/pull/3484))
- Add missing digestmod arg to HMAC ([3399](https://github.com/jupyter/notebook/pull/3399))
- Log OSErrors failing to create less-critical files during startup ([3384](https://github.com/jupyter/notebook/pull/3384))
- Use powershell on Windows ([3379](https://github.com/jupyter/notebook/pull/3379))
- API spec improvements, API handler improvements ([3368](https://github.com/jupyter/notebook/pull/3368))
- Set notebook to dirty state after change to kernel metadata ([3350](https://github.com/jupyter/notebook/pull/3350))
- Use CSP header to treat served files as belonging to a separate
    origin ([3341](https://github.com/jupyter/notebook/pull/3341))
- Don't install gettext into builtins ([3330](https://github.com/jupyter/notebook/pull/3330))
- Add missing `import _` ([3316](https://github.com/jupyter/notebook/pull/3316),
    [3326](https://github.com/jupyter/notebook/pull/3326))
- Write `notebook.json` file atomically ([3305](https://github.com/jupyter/notebook/pull/3305))
- Fix clicking with modifiers, page title updates ([3282](https://github.com/jupyter/notebook/pull/3282))
- Upgrade jQuery to version 2.2 ([3428](https://github.com/jupyter/notebook/pull/3428))
- Upgrade xterm.js to 3.1.0 ([3189](https://github.com/jupyter/notebook/pull/3189))
- Upgrade moment.js to 2.19.3 ([3562](https://github.com/jupyter/notebook/pull/3562))
- Upgrade CodeMirror to 5.35 ([3372](https://github.com/jupyter/notebook/pull/3372))
- "Require" pyzmq\>=17 ([3586](https://github.com/jupyter/notebook/pull/3586))

Documentation:

- Documentation updates and organisation ([3584](https://github.com/jupyter/notebook/pull/3584))
- Add section in docs about privacy ([3571](https://github.com/jupyter/notebook/pull/3571))
- Add explanation on how to change the type of a cell to Markdown ([3377](https://github.com/jupyter/notebook/pull/3377))
- Update docs with confd implementation details ([3520](https://github.com/jupyter/notebook/pull/3520))
- Add more information for where `jupyter_notebook_config.py` is
    located ([3346](https://github.com/jupyter/notebook/pull/3346))
- Document options to enable nbextensions in specific sections ([3525](https://github.com/jupyter/notebook/pull/3525))
- jQuery attribute selector value MUST be surrounded by quotes ([3527](https://github.com/jupyter/notebook/pull/3527))
- Do not execute special notebooks with nbsphinx ([3360](https://github.com/jupyter/notebook/pull/3360))
- Other minor fixes in [3288](https://github.com/jupyter/notebook/pull/3288),
    [3528](https://github.com/jupyter/notebook/pull/3528), [3293](https://github.com/jupyter/notebook/pull/3293), [3367](https://github.com/jupyter/notebook/pull/3367)

Testing:

- Testing with Selenium & Sauce labs ([3321](https://github.com/jupyter/notebook/pull/3321))
- Selenium utils + markdown rendering tests ([3458](https://github.com/jupyter/notebook/pull/3458))
- Convert insert cell tests to Selenium ([3508](https://github.com/jupyter/notebook/pull/3508))
- Convert prompt numbers tests to Selenium ([3554](https://github.com/jupyter/notebook/pull/3554))
- Convert delete cells tests to Selenium ([3465](https://github.com/jupyter/notebook/pull/3465))
- Convert undelete cell tests to Selenium ([3475](https://github.com/jupyter/notebook/pull/3475))
- More selenium testing utilities ([3412](https://github.com/jupyter/notebook/pull/3412))
- Only check links when build is trigger by Travis Cron job ([3493](https://github.com/jupyter/notebook/pull/3493))
- Fix Appveyor build errors ([3430](https://github.com/jupyter/notebook/pull/3430))
- Undo patches in teardown before attempting to delete files ([3459](https://github.com/jupyter/notebook/pull/3459))
- Get tests running with tornado 5 ([3398](https://github.com/jupyter/notebook/pull/3398))
- Unpin ipykernel version on Travis ([3223](https://github.com/jupyter/notebook/pull/3223))

Thanks to the following contributors:

- Arovit Narula ([arovit](https://github.com/arovit))
- Ashley Teoh ([ashleytqy](https://github.com/ashleytqy))
- Nicholas Bollweg ([bollwyvl](https://github.com/bollwyvl))
- Alex Rothberg ([cancan101](https://github.com/cancan101))
- Celina Kilcrease ([ckilcrease](https://github.com/ckilcrease))
- dabuside ([dabuside](https://github.com/dabuside))
- Damian Avila ([damianavila](https://github.com/damianavila))
- Dana Lee ([danagilliann](https://github.com/danagilliann))
- Dave Hirschfeld ([dhirschfeld](https://github.com/dhirschfeld))
- Heng GAO ([ehengao](https://github.com/ehengao))
- Leo Gallucci ([elgalu](https://github.com/elgalu))
- Evan Van Dam ([evandam](https://github.com/evandam))
- forbxy ([forbxy](https://github.com/forbxy))
- Grant Nestor ([gnestor](https://github.com/gnestor))
- Ethan T. Hendrix ([hendrixet](https://github.com/hendrixet))
- Miro Hrončok ([hroncok](https://github.com/hroncok))
- Paul Ivanov ([ivanov](https://github.com/ivanov))
- Darío Hereñú ([kant](https://github.com/kant))
- Kevin Bates ([kevin-bates](https://github.com/kevin-bates))
- Maarten Breddels ([maartenbreddels](https://github.com/maartenbreddels))
- Michael Droettboom ([mdboom](https://github.com/mdboom))
- Min RK ([minrk](https://github.com/minrk))
- M Pacer ([mpacer](https://github.com/mpacer))
- Peter Parente ([parente](https://github.com/parente))
- Paul Masson ([paulmasson](https://github.com/paulmasson))
- Philipp Rudiger ([philippjfr](https://github.com/philippjfr))
- Mac Knight ([Shels1909](https://github.com/Shels1909))
- Hisham Elsheshtawy ([Sheshtawy](https://github.com/Sheshtawy))
- Simon Biggs ([SimonBiggs](https://github.com/SimonBiggs))
- Sunil Hari (`@sunilhari`)
- Thomas Kluyver ([takluyver](https://github.com/takluyver))
- Tim Klever ([tklever](https://github.com/tklever))
- Gabriel Ruiz ([unnamedplay-r](https://github.com/unnamedplay-r))
- Vaibhav Sagar ([vaibhavsagar](https://github.com/vaibhavsagar))
- William Hosford ([whosford](https://github.com/whosford))
- Hong ([xuhdev](https://github.com/xuhdev))

See the 5.5 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.5)
involved in this release.

## 5.4.1

A security release to fix [CVE-2018-8768](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8768).

Thanks to [Alex](https://hackerone.com/pisarenko) for identifying this
bug, and Jonathan Kamens and Scott Sanderson at Quantopian for verifying
it and bringing it to our attention.

## 5.4.0

- Fix creating files and folders after navigating directories in the
    dashboard ([3264](https://github.com/jupyter/notebook/pull/3264)).
- Enable printing notebooks in colour, removing the CSS that made
    everything black and white ([3212](https://github.com/jupyter/notebook/pull/3212)).
- Limit the completion options displayed in the notebook to 1000, to
    avoid performance issues with very long lists ([3195](https://github.com/jupyter/notebook/pull/3195)).
- Accessibility improvements in `tree.html` ([3271](https://github.com/jupyter/notebook/pull/3271)).
- Added alt-text to the kernel logo image in the notebook UI ([3228](https://github.com/jupyter/notebook/pull/3228)).
- Added a test on Travis CI to flag if symlinks are accidentally
    introduced in the future. This should prevent the issue that
    necessitated `release-5.3.1`{.interpreted-text role="ref"} ([3227](https://github.com/jupyter/notebook/pull/3227)).
- Use lowercase letters for random IDs generated in our Javascript ([3264](https://github.com/jupyter/notebook/pull/3264)).
- Removed duplicate code setting `TextCell.notebook` ([3256](https://github.com/jupyter/notebook/pull/3256)).

Thanks to the following contributors:

- Alex Soderman ([asoderman](https://github.com/asoderman))
- Matthias Bussonnier ([Carreau](https://github.com/Carreau))
- Min RK ([minrk](https://github.com/minrk))
- Nitesh Sawant ([ns23](https://github.com/ns23))
- Thomas Kluyver ([takluyver](https://github.com/takluyver))
- Yuvi Panda ([yuvipanda](https://github.com/yuvipanda))

See the 5.4 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.4)
involved in this release.

## 5.3.1

Replaced a symlink in the repository with a copy, to fix issues
installing on Windows ([3220](https://github.com/jupyter/notebook/pull/3220)).

## 5.3.0

This release introduces a couple noteable improvements, such as terminal
support for Windows and support for OS trash (files deleted from the
notebook dashboard are moved to the OS trash vs. deleted permanently).

- Add support for terminals on windows ([3087](https://github.com/jupyter/notebook/pull/3087)).
- Add a "restart and run all" button to the toolbar ([2965](https://github.com/jupyter/notebook/pull/2965)).
- Send files to os trash mechanism on delete ([1968](https://github.com/jupyter/notebook/pull/1968)).
- Allow programmatic copy to clipboard ([3088](https://github.com/jupyter/notebook/pull/3088)).
- Use DOM History API for navigating between directories in the file
    browser ([3115](https://github.com/jupyter/notebook/pull/3115)).
- Add translated files to folder(docs-translations) ([3065](https://github.com/jupyter/notebook/pull/3065)).
- Allow non empty dirs to be deleted ([3108](https://github.com/jupyter/notebook/pull/3108)).
- Set cookie on base_url ([2959](https://github.com/jupyter/notebook/pull/2959)).
- Allow token-authenticated requests cross-origin by default ([2920](https://github.com/jupyter/notebook/pull/2920)).
- Change cull_idle_timeout_minimum to 1 from 300 ([2910](https://github.com/jupyter/notebook/pull/2910)).
- Config option to shut down server after n seconds with no kernels ([2963](https://github.com/jupyter/notebook/pull/2963)).
- Display a "close" button on load notebook error ([3176](https://github.com/jupyter/notebook/pull/3176)).
- Add action to command pallette to run CodeMirror's "indentAuto"
    on selection ([3175](https://github.com/jupyter/notebook/pull/3175)).
- Add option to specify extra services ([3158](https://github.com/jupyter/notebook/pull/3158)).
- Warn_bad_name should not use global name ([3160](https://github.com/jupyter/notebook/pull/3160)).
- Avoid overflow of hidden form ([3148](https://github.com/jupyter/notebook/pull/3148)).
- Fix shutdown trans loss ([3147](https://github.com/jupyter/notebook/pull/3147)).
- Find available kernelspecs more efficiently ([3136](https://github.com/jupyter/notebook/pull/3136)).
- Don't try to translate missing help strings ([3122](https://github.com/jupyter/notebook/pull/3122)).
- Frontend/extension-config: allow default json files in a .d
    directory ([3116](https://github.com/jupyter/notebook/pull/3116)).
- Use [requirejs]{.title-ref} vs. [require]{.title-ref} ([3097](https://github.com/jupyter/notebook/pull/3097)).
- Fixes some ui bugs in firefox \#3044 ([3058](https://github.com/jupyter/notebook/pull/3058)).
- Compare non-specific language code when choosing to use arabic
    numerals ([3055](https://github.com/jupyter/notebook/pull/3055)).
- Fix save-script deprecation ([3053](https://github.com/jupyter/notebook/pull/3053)).
- Include moment locales in package_data ([3051](https://github.com/jupyter/notebook/pull/3051)).
- Fix moment locale loading in bidi support ([3048](https://github.com/jupyter/notebook/pull/3048)).
- Tornado 5: periodiccallback loop arg will be removed ([3034](https://github.com/jupyter/notebook/pull/3034)).
- Use [/files]{.title-ref} prefix for pdf-like files ([3031](https://github.com/jupyter/notebook/pull/3031)).
- Add folder for document translation ([3022](https://github.com/jupyter/notebook/pull/3022)).
- When login-in via token, let a chance for user to set the password ([3008](https://github.com/jupyter/notebook/pull/3008)).
- Switch to jupyter_core implementation of ensure_dir_exists ([3002](https://github.com/jupyter/notebook/pull/3002)).
- Send http shutdown request on 'stop' subcommand ([3000](https://github.com/jupyter/notebook/pull/3000)).
- Work on loading ui translations ([2969](https://github.com/jupyter/notebook/pull/2969)).
- Fix ansi inverse ([2967](https://github.com/jupyter/notebook/pull/2967)).
- Add send2trash to requirements for building docs ([2964](https://github.com/jupyter/notebook/pull/2964)).
- I18n readme.md improvement ([2962](https://github.com/jupyter/notebook/pull/2962)).
- Add 'reason' field to json error responses ([2958](https://github.com/jupyter/notebook/pull/2958)).
- Add some padding for stream outputs ([3194](https://github.com/jupyter/notebook/pull/3194)).
- Always use setuptools in `setup.py` ([3206](https://github.com/jupyter/notebook/pull/3206)).
- Fix clearing cookies on logout when `base_url` is configured ([3207](https://github.com/jupyter/notebook/pull/3207)).

Thanks to the following contributors:

- bacboc ([bacboc](https://github.com/bacboc))
- Steven Silvester ([blink1073](https://github.com/blink1073))
- Matthias Bussonnier ([Carreau](https://github.com/Carreau))
- ChungJooHo ([ChungJooHo](https://github.com/ChungJooHo))
- edida ([edida](https://github.com/edida))
- Francesco Franchina (`ferdas`)
- forbxy ([forbxy](https://github.com/forbxy))
- Grant Nestor ([gnestor](https://github.com/gnestor))
- Josh Barnes ([jcb91](https://github.com/jcb91))
- JocelynDelalande ([JocelynDelalande](https://github.com/JocelynDelalande))
- Karthik Balakrishnan ([karthikb351](https://github.com/karthikb351))
- Kevin Bates ([kevin-bates](https://github.com/kevin-bates))
- Kirit Thadaka ([kirit93](https://github.com/kirit93))
- Lilian Besson ([Naereen](https://github.com/Naereen))
- Maarten Breddels ([maartenbreddels](https://github.com/maartenbreddels))
- Madhu94 ([Madhu94](https://github.com/Madhu94))
- Matthias Geier ([mgeier](https://github.com/mgeier))
- Michael Heilman ([mheilman](https://github.com/mheilman))
- Min RK ([minrk](https://github.com/minrk))
- PHaeJin ([PHaeJin](https://github.com/PHaeJin))
- Sukneet ([Sukneet](https://github.com/Sukneet))
- Thomas Kluyver ([takluyver](https://github.com/takluyver))

See the 5.3 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.3)
involved in this release.

## 5.2.1

- Fix invisible CodeMirror cursor at specific browser zoom levels ([2983](https://github.com/jupyter/notebook/pull/2983)).
- Fix nbconvert handler causing broken export to PDF ([2981](https://github.com/jupyter/notebook/pull/2981)).
- Fix the prompt_area argument of the output area constructor. ([2961](https://github.com/jupyter/notebook/pull/2961)).
- Handle a compound extension in new_untitled ([2949](https://github.com/jupyter/notebook/pull/2949)).
- Allow disabling offline message buffering ([2916](https://github.com/jupyter/notebook/pull/2916)).

Thanks to the following contributors:

- Steven Silvester ([blink1073](https://github.com/blink1073))
- Grant Nestor ([gnestor](https://github.com/gnestor))
- Jason Grout ([jasongrout](https://github.com/jasongrout))
- Min RK ([minrk](https://github.com/minrk))
- M Pacer ([mpacer](https://github.com/mpacer))

See the 5.2.1 milestone on GitHub for a complete list of [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.2.1)
involved in this release.

## 5.2.0

- Allow setting token via jupyter_token env ([2921](https://github.com/jupyter/notebook/pull/2921)).
- Fix some errors caused by raising 403 in get_current_user ([2919](https://github.com/jupyter/notebook/pull/2919)).
- Register contents_manager.files_handler_class directly ([2917](https://github.com/jupyter/notebook/pull/2917)).
- Update viewable_extensions ([2913](https://github.com/jupyter/notebook/pull/2913)).
- Show edit shortcuts modal after shortcuts modal is hidden ([2912](https://github.com/jupyter/notebook/pull/2912)).
- Improve edit/view behavior ([2911](https://github.com/jupyter/notebook/pull/2911)).
- The root directory of the notebook server should never be hidden ([2907](https://github.com/jupyter/notebook/pull/2907)).
- Fix notebook require config to match tools/build-main ([2888](https://github.com/jupyter/notebook/pull/2888)).
- Give page constructor default arguments ([2887](https://github.com/jupyter/notebook/pull/2887)).
- Fix codemirror.less to match codemirror's expected padding layout ([2880](https://github.com/jupyter/notebook/pull/2880)).
- Add x-xsrftoken to access-control-allow-headers ([2876](https://github.com/jupyter/notebook/pull/2876)).
- Buffer messages when websocket connection is interrupted ([2871](https://github.com/jupyter/notebook/pull/2871)).
- Load locale dynamically only when not en-us ([2866](https://github.com/jupyter/notebook/pull/2866)).
- Changed key strength to 2048 bits ([2861](https://github.com/jupyter/notebook/pull/2861)).
- Resync jsversion with python version ([2860](https://github.com/jupyter/notebook/pull/2860)).
- Allow copy operation on modified, read-only notebook ([2854](https://github.com/jupyter/notebook/pull/2854)).
- Update error handling on apihandlers ([2853](https://github.com/jupyter/notebook/pull/2853)).
- Test python 3.6 on travis, drop 3.3 ([2852](https://github.com/jupyter/notebook/pull/2852)).
- Avoid base64-literals in image tests ([2851](https://github.com/jupyter/notebook/pull/2851)).
- Upgrade xterm.js to 2.9.2 ([2849](https://github.com/jupyter/notebook/pull/2849)).
- Changed all python variables named file to file_name to not override
    built_in file ([2830](https://github.com/jupyter/notebook/pull/2830)).
- Add more doc tests ([2823](https://github.com/jupyter/notebook/pull/2823)).
- Typos fix ([2815](https://github.com/jupyter/notebook/pull/2815)).
- Rename and update license \[ci skip\] ([2810](https://github.com/jupyter/notebook/pull/2810)).
- Travis builds doc ([2808](https://github.com/jupyter/notebook/pull/2808)).
- Pull request i18n ([2804](https://github.com/jupyter/notebook/pull/2804)).
- Factor out output_prompt_function, as is done with input prompt ([2774](https://github.com/jupyter/notebook/pull/2774)).
- Use rfc5987 encoding for filenames ([2767](https://github.com/jupyter/notebook/pull/2767)).
- Added path to the resources metadata, the same as in
    from_filename(...) in nbconvert.exporters.py ([2753](https://github.com/jupyter/notebook/pull/2753)).
- Make "extrakeys" consistent for notebook and editor ([2745](https://github.com/jupyter/notebook/pull/2745)).
- Bidi support ([2357](https://github.com/jupyter/notebook/pull/2357)).

Special thanks to [samarsultan](https://github.com/samarsultan) and the
Arabic Competence and Globalization Center Team at IBM Egypt for adding
RTL (right-to-left) support to the notebook!

See the 5.2 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A5.2)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.2)
involved in this release.

## 5.1.0

- Preliminary i18n implementation ([2140](https://github.com/jupyter/notebook/pull/2140)).
- Expose URL with auth token in notebook UI ([2666](https://github.com/jupyter/notebook/pull/2666)).
- Fix search background style ([2387](https://github.com/jupyter/notebook/pull/2387)).
- List running notebooks without requiring `--allow-root` ([2421](https://github.com/jupyter/notebook/pull/2421)).
- Allow session of type other than notebook ([2559](https://github.com/jupyter/notebook/pull/2559)).
- Fix search background style ([2387](https://github.com/jupyter/notebook/pull/2387)).
- Fix some Markdown styling issues ([2571](https://github.com/jupyter/notebook/pull/2571)), ([2691](https://github.com/jupyter/notebook/pull/2691)) and ([2534](https://github.com/jupyter/notebook/pull/2534)).
- Remove keymaps that conflict with non-English keyboards ([2535](https://github.com/jupyter/notebook/pull/2535)).
- Add session-specific favicons (notebook, terminal, file) ([2452](https://github.com/jupyter/notebook/pull/2452)).
- Add /api/shutdown handler ([2507](https://github.com/jupyter/notebook/pull/2507)).
- Include metadata when copying a cell ([2349](https://github.com/jupyter/notebook/pull/2349)).
- Stop notebook server from command line ([2388](https://github.com/jupyter/notebook/pull/2388)).
- Improve "View" and "Edit" file handling in dashboard ([2449](https://github.com/jupyter/notebook/pull/2449)) and ([2402](https://github.com/jupyter/notebook/pull/2402)).
- Provide a promise to replace use of the
    `app_initialized.NotebookApp` event ([2710](https://github.com/jupyter/notebook/pull/2710)).
- Fix disabled collapse/expand output button ([2681](https://github.com/jupyter/notebook/pull/2681)).
- Cull idle kernels using `--MappingKernelManager.cull_idle_timeout` ([2215](https://github.com/jupyter/notebook/pull/2215)).
- Allow read-only notebooks to be trusted ([2718](https://github.com/jupyter/notebook/pull/2718)).

See the 5.1 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A5.1)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A5.1)
involved in this release.

## 5.0.0

This is the first major release of the Jupyter Notebook since version
4.0 was created by the "Big Split" of IPython and Jupyter.

We encourage users to start trying JupyterLab in preparation for a
future transition.

We have merged more than 300 pull requests since 4.0. Some of the major
user-facing changes are described here.

### File sorting in the dashboard

Files in the dashboard may now be sorted by last modified date or name
([943](https://github.com/jupyter/notebook/pull/943)):

![image](/_static/images/dashboard-sort.png)

### Cell tags

There is a new cell toolbar for adding *cell tags*
([2048](https://github.com/jupyter/notebook/pull/2048)):

![image](/_static/images/cell-tags-toolbar.png)

Cell tags are a lightweight way to customise the behaviour of tools
working with notebooks; we're working on building support for them into
tools like [nbconvert](https://nbconvert.readthedocs.io/en/latest/) and
[nbval](https://github.com/computationalmodelling/nbval). To start using
tags, select `Tags` in the `View > Cell Toolbar` menu in a notebook.

The UI for editing cell tags is basic for now; we hope to improve it in
future releases.

### Table style

The default styling for tables in the notebook has been updated
([1776](https://github.com/jupyter/notebook/pull/1776)).

Before:

![image](/_static/images/table-style-before.png)

After:

![image](/_static/images/table-style-after.png)

### Customise keyboard shortcuts

You can now edit keyboard shortcuts for *Command Mode* within the UI
([1347](https://github.com/jupyter/notebook/pull/1347)):

![image](/_static/images/shortcut-editor.png)

See the `Help > Edit Keyboard Shortcuts` menu item and follow the
instructions.

### Other additions

- You can copy and paste cells between notebooks, using
    `Ctrl-C`{.interpreted-text role="kbd"} and
    `Ctrl-V`{.interpreted-text role="kbd"} (`Cmd-C`{.interpreted-text
    role="kbd"} and `Cmd-V`{.interpreted-text role="kbd"} on Mac).
- It's easier to configure a password for the notebook with the new
    `jupyter notebook password` command ([2007](https://github.com/jupyter/notebook/pull/2007)).
- The file list can now be ordered by *last modified* or by *name* ([943](https://github.com/jupyter/notebook/pull/943)).
- Markdown cells now support attachments. Simply drag and drop an
    image from your desktop to a markdown cell to add it. Unlike
    relative links that you enter manually, attachments are embedded in
    the notebook itself. An unreferenced attachment will be
    automatically scrubbed from the notebook on save ([621](https://github.com/jupyter/notebook/pull/621)).
- Undoing cell deletion now supports undeleting multiple cells. Cells
    may not be in the same order as before their deletion, depending on
    the actions you did on the meantime, but this should should help
    reduce the impact of accidentally deleting code.
- The file browser now has *Edit* and *View* buttons.
- The file browser now supports moving multiple files at once ([1088](https://github.com/jupyter/notebook/pull/1088)).
- The Notebook will refuse to run as root unless the `--allow-root`
    flag is given ([1115](https://github.com/jupyter/notebook/pull/1115)).
- Keyboard shortcuts are now declarative ([1234](https://github.com/jupyter/notebook/pull/1234)).
- Toggling line numbers can now affect all cells ([1312](https://github.com/jupyter/notebook/pull/1312)).
- Add more visible *Trusted* and *Untrusted* notifications ([1658](https://github.com/jupyter/notebook/pull/1658)).
- The favicon (browser shortcut icon) now changes to indicate when the
    kernel is busy ([1837](https://github.com/jupyter/notebook/pull/1837)).
- Header and toolbar visibility is now persisted in nbconfig and
    across sessions ([1769](https://github.com/jupyter/notebook/pull/1769)).
- Load server extensions with ConfigManager so that merge happens
    recursively, unlike normal config values, to make it load more
    consistently with frontend extensions([2108](https://github.com/jupyter/notebook/pull/2108)).
- The notebook server now supports the [bundler
    API](https://jupyter-notebook.readthedocs.io/en/stable/extending/bundler_extensions.html)
    from the [jupyter_cms incubator
    project](https://github.com/jupyter-incubator/contentmanagement) ([1579](https://github.com/jupyter/notebook/pull/1579)).
- The notebook server now provides information about kernel activity
    in its kernel resource API ([1827](https://github.com/jupyter/notebook/pull/1827)).

Remember that upgrading `notebook` only affects the user interface.
Upgrading kernels and libraries may also provide new features, better
stability and integration with the notebook interface.

## 4.4.0

- Allow override of output callbacks to redirect output messages. This
    is used to implement the ipywidgets Output widget, for example.
- Fix an async bug in message handling by allowing comm message
    handlers to return a promise which halts message processing until
    the promise resolves.

See the 4.4 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A4.4)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A4.4)
involved in this release.

## 4.3.2

4.3.2 is a patch release with a bug fix for CodeMirror and improved
handling of the "editable" cell metadata field.

- Monkey-patch for CodeMirror that resolves
    [\#2037](https://github.com/jupyter/notebook/issues/2037) without
    breaking [\#1967](https://github.com/jupyter/notebook/issues/1967)
- Read-only (`"editable": false`) cells can be executed but cannot be
    split, merged, or deleted

See the 4.3.2 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A4.3.2)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A4.3.2)
involved in this release.

## 4.3.1

4.3.1 is a patch release with a security patch, a couple bug fixes, and
improvements to the newly-released token authentication.

**Security fix**:

- CVE-2016-9971. Fix CSRF vulnerability, where malicious forms could
    create untitled files and start kernels (no remote execution or
    modification of existing files) for users of certain browsers (Firefox, Internet Explorer / Edge). All previous notebook releases
    are affected.

Bug fixes:

- Fix carriage return handling
- Make the font size more robust against fickle browsers
- Ignore resize events that bubbled up and didn't come from window
- Add Authorization to allowed CORS headers
- Downgrade CodeMirror to 5.16 while we figure out issues in Safari

Other improvements:

- Better docs for token-based authentication
- Further highlight token info in log output when autogenerated

See the 4.3.1 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A4.3.1)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A4.3.1)
involved in this release.

## 4.3.0

4.3 is a minor release with many bug fixes and improvements. The biggest
user-facing change is the addition of token authentication, which is
enabled by default. A token is generated and used when your browser is
opened automatically, so you shouldn't have to enter anything in the
default circumstances. If you see a login page (e.g. by switching
browsers, or launching on a new port with `--no-browser`), you get a
login URL with the token from the command `jupyter notebook list`, which
you can paste into your browser.

Highlights:

- API for creating mime-type based renderer extensions using
    `OutputArea.register_mime_type` and `Notebook.render_cell_output`
    methods. See
    [mimerender-cookiecutter](https://github.com/jupyterlab/mimerender-cookiecutter)
    for reference implementations and cookiecutter.
- Enable token authentication by default. See
    `server_security`{.interpreted-text role="ref"} for more details.
- Update security docs to reflect new signature system
- Switched from term.js to xterm.js

Bug fixes:

- Ensure variable is set if exc_info is falsey
- Catch and log handler exceptions in `events.trigger`
- Add debug log for static file paths
- Don't check origin on token-authenticated requests
- Remove leftover print statement
- Fix highlighting of Python code blocks
- `json_errors` should be outermost decorator on API handlers
- Fix remove old nbserver info files
- Fix notebook mime type on download links
- Fix carriage symbol behavior
- Fix terminal styles
- Update dead links in docs
- If kernel is broken, start a new session
- Include cross-origin check when allowing login URL redirects

Other improvements:

- Allow JSON output data with mime type `application/*+json`
- Allow kernelspecs to have spaces in them for backward compat
- Allow websocket connections from scripts
- Allow `None` for post_save_hook
- Upgrade CodeMirror to 5.21
- Upgrade xterm to 2.1.0
- Docs for using comms
- Set `dirty` flag when output arrives
- Set `ws-url` data attribute when accessing a notebook terminal
- Add base aliases for nbextensions
- Include `@` operator in CodeMirror IPython mode
- Extend mathjax_url docstring
- Load nbextension in predictable order
- Improve the error messages for nbextensions
- Include cross-origin check when allowing login URL redirects

See the 4.3 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?utf8=%E2%9C%93&q=is%3Aissue%20milestone%3A4.3%20)
and [pull
requests](https://github.com/jupyter/notebook/pulls?utf8=%E2%9C%93&q=is%3Apr%20milestone%3A4.3%20)
involved in this release.

## 4.2.3

4.2.3 is a small bugfix release on 4.2.

> Highlights:

- Fix regression in 4.2.2 that delayed loading custom.js until after
    `notebook_loaded` and `app_initialized` events have fired.
- Fix some outdated docs and links.

## 4.2.2

4.2.2 is a small bugfix release on 4.2, with an important security fix.
All users are strongly encouraged to upgrade to 4.2.2.

> Highlights:

- **Security fix**: CVE-2016-6524, where untrusted latex output could
    be added to the page in a way that could execute javascript.
- Fix missing POST in OPTIONS responses.
- Fix for downloading non-ascii filenames.
- Avoid clobbering ssl_options, so that users can specify more
    detailed SSL configuration.
- Fix inverted load order in nbconfig, so user config has highest
    priority.
- Improved error messages here and there.

## 4.2.1

4.2.1 is a small bugfix release on 4.2. Highlights:

- Compatibility fixes for some versions of ipywidgets
- Fix for ignored CSS on Windows
- Fix specifying destination when installing nbextensions

## 4.2.0

Release 4.2 adds a new API for enabling and installing extensions.
Extensions can now be enabled at the system-level, rather than just
per-user. An API is defined for installing directly from a Python
package, as well.

Highlighted changes:

- Upgrade MathJax to 2.6 to fix vertical-bar appearing on some
    equations.
- Restore ability for notebook directory to be root (4.1 regression)
- Large outputs are now throttled, reducing the ability of output
    floods to kill the browser.
- Fix the notebook ignoring cell executions while a kernel is starting
    by queueing the messages.
- Fix handling of url prefixes (e.g. JupyterHub) in terminal and edit
    pages.
- Support nested SVGs in output.

And various other fixes and improvements.

## 4.1.0

Bug fixes:

- Properly reap zombie subprocesses
- Fix cross-origin problems
- Fix double-escaping of the base URL prefix
- Handle invalid unicode filenames more gracefully
- Fix ANSI color-processing
- Send keepalive messages for web terminals
- Fix bugs in the notebook tour

UI changes:

- Moved the cell toolbar selector into the *View* menu. Added a button
    that triggers a "hint" animation to the main toolbar so users can
    find the new location. (Click here to see a
    [screencast](https://cloud.githubusercontent.com/assets/335567/10711889/59665a5a-7a3e-11e5-970f-86b89592880c.gif)
    )

    > ![image](/_static/images/cell-toolbar-41.png)

- Added *Restart & Run All* to the *Kernel* menu. Users can also bind
    it to a keyboard shortcut on action
    `restart-kernel-and-run-all-cells`.

- Added multiple-cell selection. Users press `Shift-Up/Down` or
    `Shift-K/J` to extend selection in command mode. Various actions
    such as cut/copy/paste, execute, and cell type conversions apply to
    all selected cells.

    ![image](/_static/images/multi-select-41.png)

- Added a command palette for executing Jupyter actions by name. Users
    press `Cmd/Ctrl-Shift-P` or click the new command palette icon on
    the toolbar.

    ![image](/_static/images/command-palette-41.png)

- Added a *Find and Replace* dialog to the *Edit* menu. Users can also
    press `F` in command mode to show the dialog.

    ![image](/_static/images/find-replace-41.png)

Other improvements:

- Custom KernelManager methods can be Tornado coroutines, allowing
    async operations.
- Make clearing output optional when rewriting input with
    `set_next_input(replace=True)`.
- Added support for TLS client authentication via
    `--NotebookApp.client-ca`.
- Added tags to `jupyter/notebook` releases on DockerHub. `latest`
    continues to track the master branch.

See the 4.1 milestone on GitHub for a complete list of
[issues](https://github.com/jupyter/notebook/issues?page=3&q=milestone%3A4.1+is%3Aclosed+is%3Aissue&utf8=%E2%9C%93)
and [pull
requests](https://github.com/jupyter/notebook/pulls?q=milestone%3A4.1+is%3Aclosed+is%3Apr)
handled.

## 4.0.x

### 4.0.6

- fix installation of mathjax support files
- fix some double-escape regressions in 4.0.5
- fix a couple of cases where errors could prevent opening a notebook

### 4.0.5

Security fixes for maliciously crafted files.

- [CVE-2015-6938](http://www.openwall.com/lists/oss-security/2015/09/02/3):
    malicious filenames
- [CVE-2015-7337](http://www.openwall.com/lists/oss-security/2015/09/16/3):
    malicious binary files in text editor.

Thanks to Jonathan Kamens at Quantopian and Juan Broullón for the
reports.

### 4.0.4

- Fix inclusion of mathjax-safe extension

### 4.0.2

- Fix launching the notebook on Windows
- Fix the path searched for frontend config

### 4.0.0

First release of the notebook as a standalone package.
