Firefox 12 for Windows, Mac and Linux.

Mozilla has released Firefox 12 for Windows, Mac and Linux.

See whats new below:

NEW
Windows: Firefox is now easier to update with one less prompt (User Account Control)
Page Source now has line numbers

CHANGED
Line breaks are now supported in the title attribute
Improvements to "Find in Page" to center search result
URLs pasted into the download manager window are now automatically downloaded

DEVELOPER
Support for the text-align-last CSS property has been added
Experimental support for ECMAScript 6 Map and Set objects has been implemented

FIXED
Various security fixes
Some TinyMCE-based editors failed to load (739141)
OS X: WebGL performance may be degraded on some hardware (713305)

For more info head to Mozilla