Firefox Beta is the build for those who like a little bit of jeopardy, but who don’t want to risk everything by trying out Firefox Aurora, the early alpha build of Firefox. Firefox Beta gives you a sneak peek at the next version of Firefox six weeks ahead of its final release, offering a relatively stable build that’s not quite ready for primetime, but still pretty solid.
Whereas Firefox Aurora installs as a completely separate application alongside your existing Firefox installation, Firebox Beta will replace the stable build. Should you subsequently wish to go back to the safer version, you’ll need to manually download the stable version and install it over the top of the beta build.
Confirm which build you have by selecting About Firefox from the Firefox menu or button (it’s inside the Help menu if using the Firefox button).
Firefox 26 is now in the Beta channel. Changes in this release include:
NEW. All plug-ins, with the exception of recent Flash plug-ins, are defaulted to 'click to play'
NEW. Password manager now supports script-generated password fields
NEW. Support for H.264 on Linux if the appropriate gstreamer plug-ins are installed
CHANGED. Support for MP3 decoding on Windows XP, completing MP3 support across Windows OS versions
DEVELOPER. Social API now supports Social Bookmarking for multiple providers through its SocialMarks functionality
FIXED. Improved page load times due to no longer decoding images that aren't visible