Experience cutting edge features but with more stability.

Mozilla has switched Firefox to a rapid release development cycle which means new versions will come more frequently. The non-profit organization has promised to push out a new stable build every six weeks.

The latest Mozilla Firefox Beta is now available for testing on Windows, Mac, Linux and Android. This beta includes performance enhancements that improve the browsing experience for users and enable developers to create faster Web apps and websites.

New in Firefox Alpha for Windows, Mac and Linux:

• Optimized Memory Use: Reduces memory use and improves performance areas including responsiveness, startup and page load time, even in complex websites and Web apps
• Improved memory management: The JavaScript garbage collector works more frequently to free up memory and improve performance when you have many tabs open or keep Firefox running for a long time
• Enhanced Firefox Sync: Your data syncs faster when a bookmark or password is added or changed
• Azure Direct2D for Canvas: Helps Firefox speed up HTML5 Canvas-based animation rendering
• Web timing spec: Enables developers to measure page load time and site navigation so they can identify how to make website performance improvements
• CSS 3 Text-Overflow: ellipsis: Additional way for developers to display CSS 3 text that overflows the layout area
• Telemetry: Install this add-on and opt-in to report browser performance data and help improve future versions of Firefox
  

What's New:

• Add-ons installed by third party programs are now disabled by default
• Added a one-time add-on selection dialog to manage previously installed add-ons
• Added Twitter to the search bar
• Added a preference to load tabs on demand, improving start-up time when windows are restored
• Improved tab animations when moving, reordering, or detaching tabs
• Improved performance and memory handling when using
• Added CORS support for cross-domain textures in WebGL
• Added support for HTML5 context menus
• Added support for insertAdjacentHTML
• Improved CSS hyphen support for many languages
• Improved WebSocket support
• Fixed several stability issues