Firefox Release Data has facilities for aggregating and exposing information about Firefox releases performed from Mercurial changesets.

This feature is currently only enabled on the mozilla-central repository.


Release Info on Changeset Pages

Changeset pages like display information on Firefox releases in relation to that changeset.

Most pages should have a first release with and last release without section. Exceptions include changesets in the very early and very modern repository history. (This info isn’t displayed unless we can find a release in both directions.)

If a release was made from that changeset, there will also be information on those releases. e.g. This includes a link to the pushlog containing changesets landed between two releases.

Listing of Known Releases

The firefoxreleases web command renders known Firefox releases from changesets in a repo. e.g.

A JSON view is available by using the json-firefoxreleases web command. e.g.

Filtering by platform is available by specifying the platform query string argument. e.g.


If you want to read this data from machines, a better source might be

Development Info

Please file bugs and feature requests against the Bugzilla component.

For real time support, make noise in #vcs on