download at http://www.mozilla.com/en-US/firefox/all-beta.html
release note: http://www.mozilla.com/en-US/firefox/4.0b2/releasenotes/
whats new:
1. Tab on top on OSX now.
2. right click on tab to "make it into an app tab"
3. various speed improvement
previously on firefox 4 beta 1:
1. switch to already opened tab from awesome bar.
2. new addon manager
3. WebGL
4. WebM
5. D2D on windows
6. More HTML5
7. various speed improvement
release note: http://www.mozilla.com/en-US/firefox/4.0b2/releasenotes/
whats new:
1. Tab on top on OSX now.
2. right click on tab to "make it into an app tab"
3. various speed improvement
previously on firefox 4 beta 1:
1. switch to already opened tab from awesome bar.
2. new addon manager
3. WebGL
4. WebM
5. D2D on windows
6. More HTML5
7. various speed improvement