Now that Firefox has officially kick-started the new Beta Channel, you may be eager to try it out on your Ubuntu system. All that it takes is a few minutes of your time to add the new PPA to your system and you will be ready to enjoy that Firefox Beta goodness!
Note: Keep in mind that the new beta channel version automatically replaced the stable 4.0 version we had installed on our Ubuntu 11.04 system! So if you prefer the stable version then you may want to pass on installing the beta channel.
To add the new PPA for the Firefox Beta Channel open the Ubuntu Software Center, go to the Edit Menu, and select Software Sources. Access the Other Software Tab in the Software Sources Window and add the first of the PPAs shown below (outlined in red). The second PPA will be automatically added to your system.
Once you have the new PPAs set up, go back to the Ubuntu Software Center and click on the PPA listing for Firefox releases from the beta channel (highlighted with red in the image). Enter Mozilla in the Search Bar to “hide” all of the language packs you will see when first viewing the new PPA. Look for the Mozilla – development files (firefox-dev) listing and click Install.
After the installation is complete you can start having fun with your new Firefox beta!
Command Line Installation
For those of you who prefer using the command line for installation use the following commands:
sudo add-apt-repository ppa:mozillateam/firefox-next
sudo apt-get update
sudo apt-get install firefox