Rated 5 out of 5 stars

Update to developers' reply to __NEEDS__: The link you provided may work for WIN systems but the path to prefs.js for UBUNTU is:
/home/<insert user name here>/.mozilla/firefox/<insert 8 character randon name here>.default/prefs.js

Please original messages fro further details. I've used Configuration Mania for several years, and would likely not use FF without it or something similar. Frankly

This review is for a previous version of the add-on (1.14.2011040901.1-signed).