Rated 5 out of 5 stars

A very much needed addon after Firefox 23.0 removed the option to disable Javascript.

Firefox 23 also does not have a status bar, so to use this addon, after installing it and restarting firefox, go to Tools, Addons, click the Options button beside JS Switch, and tick the box for "Show and Option in Tool Menu", then you can access it in the Tools menu in the browser top menu bar.