Firefox 7.0 final has been released on September 27th, in this version it has the following changes:

Drastically improved memory handling for certain use cases
Added a new rendering backend to speed up Canvas operations on Windows systems
Bookmark and password changes now sync almost instantly when using Firefox Sync
The ‘http://’ URL prefix is now hidden by default
Added support for text-overflow: ellipsis
Added support for the Web Timing specification
Enhanced support for MathML
The WebSocket protocol has been updated from version 7 to version 8
Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox
Fixed several stability issues
Fixed several security issues

For more, see firefox release notes


1.) Download Firefox 7.0 for non installation: FTP downloading.
Just download and extract firefox-7.0.tar.bz2, and then click the file to launch Firefox 7.0

2.) Ubuntu 10.04 and 10.10 user can install Firefox 7 from firefox-stable/ppa by running following commands:

sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update
sudo apt-get install firefox

3.) Ubuntu 11.10 user can upgrade from default installed Firefox 7 beta via update-manager or by running:

sudo apt-get update
sudo apt-get upgrade

I’m running Ubuntu Oneiric beta, I don’t know If Firefox 7 is available in Ubuntu 11.04 Natty’s universe repository. So tell me how if you installed Firefox 7 final in Natty.