PrefBar started as a simple toolbar to get easy access to common preferences like Javascript, Flash, the proxy used for web access, ... Over the time, PrefBar got further developed to be a container for nearly everything, that can be placed on a button, checkbox or menulist.

All items may be placed and grouped freely on PrefBar's bar. The bar itself may be moved using the browser built-in "toolbar customize" feature to anywhere you like (even in foreign toolbars, next to the menubar, ...).