Rated 5 out of 5 stars

Excellent add-on, has been a favorite of mine for years.

Only thing that could make it better was if it was restartless. Any chance of this?

This review is for a previous version of the add-on (4.1.17). 

It's only been recently that enough of the issues that would've made this difficult to impossible to do were fixed in Firefox. Making Flagfox restartless is high up on my todo list now, but I'd have to drop Firefox 3.x-9.0 support to do so, so I won't be doing it right away.