keyconfig allows you to change keyboard shortcuts. [Firefox, Thunderbird, SeaMonkey, and any other XULRunner Application]
keyconfig adds the ability to create new or modify existing shortcuts defined by a
The configuration screen can be accessed via Tools > Keyconfig (in most Applications), the Add-ons Manager, or Ctrl+Shift+F12 (Command+Shift+F12 on MacOS) from the main window.
Currently there is only one list of modified keys per application, so changing a shortcut in one window will also affect other windows if they use the same key name.