Rated 5 out of 5 stars

Thanks for this great add-on, it has served well for many years already, and ive noticed that out of 6 addons i use now, only Password Editor requires Firefox to be restarted :/ Is it possible to make it NO RESTART please?

This review is for a previous version of the add-on (2.9.4). 

I understand the problem. It's not so easy to do, though. SPE is dependent on doing things in a way that requires restarting to (un)install, enable, and disable. It can be adapted, but it's by no means a trivial change; it will probably require rewriting a lot of it from scratch. It won't be long, though, that I'll have to change it anyway, since Firefox is going to stop supporting traditional add-ons.