In 2011 itself, in only few months apart, Mozilla already released 3 new versions,  i.e. Firefox 5, 6 and 7. These versions differ only on smaller incremental updates, primarily on the improving speed, stability and security.

Released on September 27th 2011, Firefox 7 focuses on improving memory consumption and performance.

New features in Firefox 7 consist of:

• Lesser memory usage. Memory usage is now cut down (as much as 50% lesser) and Firefox 7 is able to free up memory by closing tabs, which was not possible previously.
• Improved rendering performance.  Azure Direct2D allows quick rendering of HTML5 canvas operations.
• Quick retrieval of bookmarks. With Firefox Sync, now bookmarks and passwords sync almost instantly between different computers that you used
• Shorter display of web link. “http://” URL prefix is now removed from the address bar. However, some users prefer this to be added back, or have it be optional, not just completely gone.
• Better logging. Includes the option to send back telemetry data / memory usage statistics to Mozilla. E.g. the CPU and RAM load, interface responsiveness, startup speed.
• Updated Websocket for HTML5. The WebSocket protocol has been updated from version 7 to version 8.