Rated 4 out of 5 stars

Well, I'm not sure what you mean by "good", but there are a lot of restartless add-ons with settings.
URL Fixer, User Style Manager, Places Maintenance, KillSpinner, but I'd suggest you to take a look at Instant Fox and Location Bar Enhancer and maybe Glass My Fox if you like the settings to be shown inside AOM, not in a separate window.

This review is for a previous version of the add-on (0.4.6.8).  This user has a previous review of this add-on.