Mozilla now serving Firefox updates’ betas
Mozilla announced the Mozilla Community Beta Program, which have started pushing Firefox updates release candidates to users who have previously downloaded a beta version.
Previously, updates’ (like 22.214.171.124, 126.96.36.199) release candidates were only available as a direct download users would have to look for regularly. The result was that these updates were not as thoroughly tested as releases (like 1.0, 1.5 or 2.0) which was a waste of previously signed in beta users who can provide a much wider test base.
As of now, users who downloaded a beta version of Firefox are receiving 188.8.131.52 release candidates now.
If you are interested in trying this betas/release candidates, you can download a previous Firefox beta version. Or, you can tweak a Firefox parameter to change your channel: