v4.0.379
Merge pull request #17461 from mozilla/dependabot/github_actions/actions/deploy-pages-4
[api-minor] Move to Fluent for the localization (bug 1858715)
Update links from IRC to Matrix.
Attempt to clarify the meaning of "extension" in the ISSUE_TEMPLATE
Stop Dependabot from creating its own, otherwise unused, labels
Add workflow to lint Fluent en-US files