Waiting for FF4? Rated 4 out of 5 stars

Do you want to use that addon?
Then install Greasemonkey and CheckBoxMate script.
Greasemonkey: https://addons.mozilla.org/en-US/firefox/addon/748/
Script: http://userscripts.org/scripts/show/73700
It works perfectly! (always left click on checkbox and select checkbox)

This review is for a previous version of the add-on (0.9.1.1-signed).