One of the neat features of Firefox is the ability to customize the browser with Extensions, Themes and Plug-Ins. But sometimes there are problems a theme does something funky to your browser. Or may be an extension goes haywire and gets corrupted. Then there is the site you visit that just doesn’t behave or display the way it should (missing plug-in). Finally, lets add into the mix, multiple builds & versions of Firefox. There are so many possibilities of what could be the problem. If you have a lot of extensions (last count for me was 40) installed, it is…