Not configurable Rated 1 out of 5 stars

The sortcuts should be customizable.

This review is for a previous version of the add-on (2.2). 

Customize every shortcut with keyconfig

You can customize every shortcut in Firefox using the keyconfig extension from Just install and start it from the Tools menu and change the values for cot2_CloseOtherTabs, cot2_CloseTabsAtLeft and cot2_CloseTabsAtRight as you like.