Firefox 20 released
Firefox Notes - Desktop


View notes for:


Desktop


Mobile





        Notes (First offered to release channel users on April 2, 2013)

Check out "Whats New" and "Known Issues" for this version of Firefox below. As always, youre encouraged to tell us what you think, or file a bug in Bugzilla. We'd also like extend a special thank you to all of the new Mozillians who contributed to Firefox 20!

    If interested, please see the
    complete list of changes
    in this release.


What’s New



NEW

Per-window Private Browsing. Learn more.



NEW

New download experience. Learn more.



NEW

Ability to close hanging plugins, without the browser hanging



CHANGED

Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.)



DEVELOPER

Continued implementation of draft ECMAScript 6 - clear() and Math.imul



DEVELOPER

New JavaScript Profiler tool



HTML5

getUserMedia implemented for web access to the user's camera and microphone (with user permission)



HTML5

<canvas> now supports blend modes



HTML5

Various <audio> and <video> improvements



FIXED

                      Details button on Crash Reporter
                      (793972)
                    


FIXED

                      Unity plugin doesn't display in HiDPI mode
                      (829284)
                    

FIXED

20.0: Security fixes can be found here






Known Issues




                        Unresolved
                    
If you try to start Firefox using a locked profile, it will crash (see 573369)



                        Unresolved
                    
Some function keys may not work when pressed (see 833719)




                        Unresolved
                    
Browsing and Download history clearing needs unification to avoid confusion on clearing download history (see 847627)




                        Unresolved
                    
Download statusbar add-on continues downloading files from Normal Browsing, when switching to Private Browsing (see 853463)



                        Unresolved
                    
Copy actions are broken on HTML5 videos (see 855726)





