Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit

* Add hide obsolete support

* Fix duplicate class

* Add css trailing space for code readability

Git stats


Failed to load latest commit information.
Latest commit message
Commit time

Chrome Platform Status

Mission is the official tool used for for tracking feature launches in Blink (the browser engine that powers Chrome and many other web browsers). This tool guides feature owners through our launch process and serves as a primary source for developer information that then ripples throughout the web developer ecosystem.

Get the code

For a one-click setup that leverages devcontainers, check out the devcontainer README. Otherwise, to continue setting up locally:

git clone


  1. Install gcloud and needed components:
    1. Before you begin, make sure that you have a java JRE (version 8 or greater) installed. JRE is required to use the DataStore Emulator and openapi-generator-cli.
    2. Google App Engine SDK for Python. Make sure to select Python 3.
    3. gcloud init
    4. gcloud components install cloud-datastore-emulator
    5. gcloud components install beta
  2. Install other developer tools commands
    1. node and npm.
    2. Gulp: npm install --global gulp-cli
    3. Python virtual environment: sudo apt install python3.10-venv
  3. We recommend using an older node version, e.g. node 18
    1. Use node -v to check the default node version
    2. nvm use 18 to switch to node 18
  4. cd chromium-dashboard
  5. Install JS an python dependencies: npm run setup
    1. Note: Whenever we make changes to package.json or requirements.txt, you will need to run npm run clean-setup.

If you encounter any error during the installation process, the section Notes (later in this may help.


To start the main server and the notifier backend, run:

npm start

Then visit http://localhost:8080/.

To start front end code watching (sass, js lint check, babel, minify files), run

npm run watch

To run lint & lit-analyzer:

npm run lint

To run unit tests:

npm test

This will start a local datastore emulator, run unit tests, and then shut down the emulator.

There are some developing information in


  • If you get an error saying No module named protobuf or No module named six or No module named enum , try installing them locally with pip install six enum34 protobuf.

  • When installing the GAE SDK, make sure to get the version for python 3.

  • If you run the server locally, and then you are disconnected from your terminial window, the jobs might remain running which will prevent you from starting the server again. To work around this, use npm run stop-emulator; npm stop. Or, use ps aux | grep gunicorn and/or ps aux | grep emulator, then use the unix kill -9 command to terminate those jobs.

  • If you need to test or debug anything to do with dependencies, you can get a clean start by running npm run clean-setup.

  • Occasionally, the Google Cloud CLI will requires an update, which will cause a failure when trying to run the development server with npm start. An unrelated error message Failed to connect to localhost port 15606 after 0 ms: Connection refused will appear. Running the gcloud components update command will update as needed and resolve this issue.

Blink components

Chromestatus currently gets the list of Blink components from the file

Seed the blink component owners

Visit http://localhost:8080/admin/blink/populate_blink to see the list of Blink component owners.

Debugging / settings contains a list of globals for debugging and running the site locally.


If you have uncommited local changes, the appengine version name will end with -tainted. It is OK to test on staging with tainted versions, but everything should be committed (and thus not tainted) before staging a version that can later be pushed to prod.

Note you need to have admin privileges on the cr-status-staging and cr-status cloud projects to be able to deploy the site.

Run the npm target:

npm run staging

Open the Google Developer Console for the staging site and flip to the new version by selecting from the list and clicking MIGRATE TRAFFIC. Make sure to do this for both the 'default' service as well as for the 'notifier' service.

Alternatively, run npm run staging-rc to upload the same code to a version named rc for "Release candidate". This is the only version that you can test using Google Sign-In at

If manual testing on the staging server looks good, then repeat the same steps to deploy to prod:

npm run deploy

Open the Google Developer Console for the production site

The production site should only have versions that match versions on staging.


Copyright (c) 2013-2022 Google Inc. All rights reserved.

Apache2 License.