Another new version of Firefox was announced today. Version 15 includes some new features, like silent updates (which I will immediately disable), and some fixes for long-standing plugin memory use issues.

The Firefox release notes for version 15 have all the changes.

Interestingly, there doesn’t seem to be a list of previous Firefox versions or the corresponding release notes anywhere on the site. But you can find the release notes for a version by replacing ‘15.0’ with any other version number in this URL:
http://www.mozilla.org/en-US/firefox/15.0/releasenotes/.