Firefox 13 Final has been released on June 5, 2012.
What's new in Firefox 13.0:
- When opening a new tab, users are now presented with their most visited pages
- The default home page now has quicker access to bookmarks, history, settings, and more
- SPDY protocol now enabled by default for faster browsing on supported sites
- Restored background tabs are not loaded by default for faster startup
- Smooth scrolling is now enabled by default
- 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor
- The column-fill CSS property has been implemented
- Experimental support for ECMAScript 6 Map and Set objects has been implemented
- Support for the CSS3 background-position property extended syntax has been added
- The :invalid pseudo-class can now be applied to the
- The CSS turn <angle> unit is now supported
