Opera is one of the fastest browser available,you can install opera in few clicks.Latest version of Opera is just released.So you can install opera 10.10 on Linux Mint 9.0 (or any other Linux version) by following three steps :

Installation of Opera 10.10 on Linux Mint 9.0 :

Step1, Open any browser and go to opera’s official website for downloading the latest version for Linux Mint 9.0, Download Opera 10.10