The Linux Mint 13 Maya Repositories Depends from the Ubuntu Precise Ones that at This Time as Latest Thunderbird Release are Serving the Thunderbird 14.
Linux Mint 13 is Already Equiped of a Thunderbird 12 Release by Default So After Updating the Symlink you Can Follow to Start Thunderbird by the Existing Desktop Launcher…
The Same Procedure with only some Little changes will Work also on Other Mint 13 Desktop Releases.
The Post Include the Basic ScreenShots to Make Easier the Whole Visualization Steps Involved.
Download Latest Thunderbird for LinuxThunderbird 68 i686 tar.bz2
Double-Click on Archive and Extract Into /tmp
Open a Terminal Window
(Press “Enter” to Execute Commands)
Login as the SuperUser
If Got “User is Not in Sudoers file” then see: How to Enable sudo
sudo chown -R root:root /tmp/thunderbird && mv /tmp/thunderbird /opt/
Make a SymLink
ln -fs /opt/thunderbird/thunderbird /usr/bin/thunderbird
After you Should Start Thunderbird also from already Existing Thunderbird Launcher…
Create a Linux Mint Application Launcher:
How to Install Firefox Nightly on Linux Mint: