Firefox 13, is now available for download , the new version should be faster and handle memory leaks better than the previous one. Several new features have been introduced:
A new Home page, that offers easy access to bookmarks, downloads, history, add-ons sync and settings (see video).
Frequently visited sites reintroduced, showing linked thumbnail of frequently visited websites when you open a new tab, with the ability to pin or remove certain items, “standard” blank tab page option still available by clicking on the grid icon in the upper right corner.
Reset Firefox, attempts to fix major issues with a single click, by migrating your data from the current, corrupt profile to an entirely new one. It can be accessed by typing “about:support” into the Firefox address bar.