Rated 4 out of 5 stars

It works, but it is a bit hard to use. I managed to bind a key to “Search events and tasks” so I'm happy.
You will find explanations on the official website [1] and have to search for the precise command name with the DOM explorer (Ctrl + Shift + I) [2].

[1] https://github.com/willsALMANJ/tbkeys
[2] http://kb.mozillazine.org/Keyconfig_extension#Finding_code_for_keys

This review is for a previous version of the add-on (2.1.0). 

Rated 4 out of 5 stars

I just needed to replace the close tab on escape add on and it was easy. Finding the correct operators is a bit hard and so far I can't get it to work in the compose window at all.

This review is for a previous version of the add-on (2.1.0). 

Rated 5 out of 5 stars

Nice and easy to unbind all the keys, only one I've found to still work.
Open the add on, scroll to the bottom, click 'unset singles', click save, done. Thanks.

This review is for a previous version of the add-on (2.1.0).