Firefox 12 is released

As always, according to tradition, the new stable build of Firefox is available a couple of days before the official announcement, which is expected on April 24 (Tuesday) .
What's new in this version:

• Improved browser update process - as promised, Firefox received a “silent update” mode for Windows users;
• Updated media controls: Firefox 12 now includes enhanced controls for HTML5 media controls;
• Improved developer tools : this version has over 85 enhancements for developers. Updated Web Console, Simple JavaScript Editor, Style Editor, HTML Viewer and 3D View in the Page Inspector;
• Line numbering has been added to the web page source code view;
• Added support for multi-line tooltips (title attribute) ;
• Support for centering search results has been added to the “Find on page” function (Ctrl + F);
• When inserting links into the download manager, files will now automatically start loading;
• Added support for CSS column-fill;
• Added support for CSS text-align-last
• Fixed a bug with the speed of WebGL on Mac OS X;
• Implemented experimental support for Map and Set objects from ECMAScript 6;

Important: from April 24, support for Firefox version 3.6.X will stop

References:
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