Here’s how to install Firefox 10 in Linux Mint 12 / Ubuntu 11.10: 1. Issue the following command at the terminal – sudo apt-add-repository ppa:mozillateam/firefox-next 2. Now, issue the following command at the terminal – sudo apt-get update 3. After package lists have been updated,  issue the following command at the terminal to install / upgrade to Firefox 10 – sudo...