If you don’t mind running not-quite-final Firefox code and would like to test the latest and greatest stable-ish versions of Firefox, you can alter the built-in update system so that it notifies you of new beta versions and release candidates. It’ll even let you download nightly builds if you’re really keen, though be warned that these can carry nasty bugs.
To do this, install the Update Channel Changer extension. This lets you choose one of the following options for updates:
- Release – final, stable versions of Firefox, such as the latest 18.104.22.168. This is the default.
- Beta – beta releases, as well as release candidates. Will also deliver final versions if no beta is available.
- Nightly – receive a new build every day. May contain major bugs so not recommended.
Right now there’s no beta available,
but Firefox 22.214.171.124 will be out any day now – bits of it have started appearing on Mozilla’s FTP servers. The release contains a fix to a public but as yet un-exploited security flaw.
Note that this extension will also work with Thunderbird.