Add-ons

Menu Wizard by Oleksandr

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Xpunge by Theodore Tegos

Empties the Trash and Junk folders, and compacts folders in multiple Thunderbird accounts.

ThunderBrowse by GS! Networks

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

Custom Address Sidebar by shimamu

Allow you to help address sidebar more useful.

DIV by div

Adolescence is wrist cut by ayu-chang

Death in the Imperial capital by ayu-chang

The pilgrimage to the 88 temples, "mamo version" by ayu-chang

R Shitei SHOXX by ayu-chang