Firefox 7 has been released, this release is comming with a big improvemrnt of memory usage and sync, CSS3 text overflow, Azure for improved HTML5 animation, web timing spec – a feature that enables developers to measure page load time and more.
Firefox 7 is using less memory than Firefox 6 (and 5 and 4): around 20% to 30% less, and sometimes 50% less. In particular, Firefox 7′s memory usage will stay steady if you leave it running overnight, and it will free up more memory when you close many tabs.
Up to 50% less memory usage is a big number. Probably even more important than that is that the browser won’t feel like eating up all the RAM over time anymore, which is definitely a good thing, considering that the browser has a reputation for being memory inefficient.
Install via PPA:
sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update
sudo apt-get install firefox