SettingInsanity is a fork of the SettingSanity add-on for Firefox by RealityRipple. It is an add-on that restores a few settings that were removed from the Options window. It also adds the option of toolbar buttons for toggling Images and JavaScript without opening your preferences.
Sirius Cybernetics Corporation Complaints Division Motto
http://shareandenjoy.realityripple.com/
Share and Enjoy, Share and Enjoy, Journey through life with a plastic boy Or girl by your side, let your pal be your guide, And when it breaks down or starts to annoy, Or grinds when it moves and gives you no joy Cos it's eaten your hat or had sex with your cat, Bled oil on your floor or ripped off your door, And you get to the point you can't stand any more, Bring it to us, we won't give a fig. We'll tell you 'Go stick your head in a Pig'
(This code is in the public domain. No ownership is implied.)
Simply download the contents of the "src" folder and pack the contents into a .zip file. Then, rename the file to .xpi and drag into the browser.
Check the releases page of this repository.