Mozilla finally announced the stable release of Firefox 36, the new release features HTTP/2 protocol support and various bug-fixes.

The full HTTP/2 protocol support in Fixfox 36 enables a faster, more scalable, and more responsive web. Firefox 36 also adds beta support for native HTML5 YouTube playback, but it’s not enabled by default. To enable this feature, go to about:config page, search for and set value of “media.mediasource.enabled” to true

Below is the full list of changes in Firefox 36 (via: Firefox 36 official release note)

• Pinned tiles on the new tab page can be synced
• Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.
• Locale added: Uzbek (uz)
• -remote option removed
• No longer accept insecure RC4 ciphers whenever possible
• Phasing out Certificates with 1024-bit RSA Keys
• Shut down hangs will now show the crash reporter before exiting the program
• Add-on Compatibility
• Support for the ECMAScript 6 Symbol data type added
• unicode-range CSS descriptor implemented
• CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries
• object-fit and object-position implemented.
  Defines how and where the content of a replaced element is displayed
• isolation CSS property implemented.
  Create a new stacking context to isolate groups of boxes to control which blend together
• CSS3 will-change property implemented.
  Hints the browser of elements that will be modified. The browser will perform some performance optimization for these
• Changed JavaScript ‘const’ semantics to conform better to the ES6 specification.
  The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.
• Improved ES6 generators for better performance
• Eval sources now appear in the Debugger. Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor
• DOM Promises inspection
• Inspector: More paste options in markup view
• CSS gradients work on premultiplied colors
• Fix some unexpected logout from Facebook or Google after restart
• Various security fixes

How to Upgrade Firefox in Ubuntu:

Firefox 36 will be made into Ubuntu repositories very soon, by then you can upgrade Firefox through Software Updater in Ubuntu 14.10, Ubuntu 14.04, Ubuntu 12.04 or Linux Mint 17.1/13.