One of the most common complaints which heard of Firefox in recent years has been about voracious use of system RAM. The Firefox 7 launched recently, which approaches this issue face-to-face with MemShrink a project that decreases memory usage up to 20 to 50 %, according to Mozilla, the nonprofit organization that develops Firefox. This translates into faster performance and less likely to crash. Version 7 also adds some new development tools and hardware graphics acceleration, and an opt-in reporting tool for Mozilla to know the problems of use.

Mozilla has declared the latest version in a blog post named, "Mozilla Firefox Significantly Reduces Memory Use to Make Web Browsing Faster" Simultaneously, the mobile version of Firefox for Android was declared, which now allows users to copy as well as paste from web sites to destinations outside the browser, like SMS messages and e-mails.

The new version also addresses main complaint: the starting time. Firefox has taken longer to launch running any browser competition for years. It is especially a difficulty for a cold to initiate, the first you run the application after rebooting. In a quick similarity test among Firefox 6 and Firefox 7, it realized that it had made an improvement: The previous version had 8 seconds to start, whereas it improved in version 7 as 5 seconds. This remains, though, lagged behind Internet Explorer 2.5 of 9 seconds and 13 seconds of Chrome 4.2 on core 2 Duo of 2.6 GHz with 3 GB of RAM.

Mozilla claims that not only improved boot speed, however it also opening tabs, buttons and menus on web sites. It also states that "regular Internet users have improved performance in a lot of open tabs and during web browsing sessions provided that the days of the last hours or else even days."