Firefox 13 was released on June 5, 2012.[57] Firefox 13 adds and updates several features, such as an updated new tab[85] and home tab page.[86] The updated new tab page is a feature similar to the Speed Dial already present in Opera, Google Chrome, Apple Safari, and Windows Internet Explorer. The new tab page will display nine of the user's most visited websites, along with a cached image.
In addition to the updated new tab and home tab page, Mozilla has added a user profile cleaner/reset, reduced hang times, and implemented tabs on demand.[87] The user profile cleaner/reset provides a way for users to fix Firefox errors and glitches that may occur.[88] Mozilla's tabs on demand restores tabs that were open in the previous session, but will keep the tabs unloaded until the user requests to view the page.[89]
Starting with this version, Windows support was exclusively for Windows XP SP2/SP3, Windows Vista, & Windows 7.