After five weeks of testing on the Firefox Aurora channel, Firefox 5 has graduated to the beta channel. Maybe more important is the fact that this release shipped on time, which bodes well for Mozilla's planned June 21 launch date for the final version. And while there aren't a ton of changes in Firefox 5, Mozilla's mechanics rooted out 1,053 bugs under the hood for what's hopefully a smoother ride.
Other than bug fixes, Firefox beta 5 introduces the following changes:
Added support for CSS animations
Added support for switching Firefox development channels
The Do-Not-Track header preference has been moved to increase discoverability
Improved standards support for HTML5, XHR, MathML, SMIL, and canvas
Improved spell checking for some locales
Improved desktop environment integration for Linux users
For a longer -- much longer -- and more detailed list of what's new in Firefox 5, oil up your mouse's scroll wheel and run through the complete list of changes here.