Mozilla has released Firefox 9, which brings speed improvements and uses less memory than previous releases. In fact, this release effectively puts Firefox back on a level playing field with Google Chrome when it comes to speed.
If you’d like to try out Firefox 9, then follow following howto to intall Firefox 9 on Ubuntu
Step 1 Open a terminal, and run following command.
sudo apt-add-repository ppa:mozillateam/firefox-next
Step 2 Finally, run the commands below to update your system and install Firefox 9.0
sudo apt-get update sudo apt-get install firefox
That’s it.
My name is Vidyadhar Sarmalkar & I work as a consultant and have done RHCE & CCNA. 
