indispensable Rated 5 out of 5 stars
Indispensible. I love it.
With so many extensions adding status bar icons, it would drive me mad if I could hide the ones I didn't want and arrange the remaining visible ones into the order that best suits me.
This is one of the first extensions I add on any new install of Firefox.
The only thing missing is the option to replace existing status bar icons with icons of your own choosing,