Rated 5 out of 5 stars

Very versatile alternative to QuickJava, allowing you to disable/enable flash, java, javascript, pipelining, clear cookies, cache, history etc., select various useragents and proxies. It can either be used as a toolbar or a drop down menu from an icon in the Firefox Navigation Toolbar- addable by right clicking navigation/menu bar, customize, and drag Prefbar Menu icon onto the toolbar where ever you want it. To add new options click customize on the right of the prefbar, then drag any option you want on the left i.e. Hide Toolbar and drag to the right pane, click OK.

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