I have been trying to uninstall several extensions for firefox. I'm told by the Add-Ons window that these extensions will be uninstalled when I restart firefox, but they come back every time I restart. I've tried clearing the extensions cache from my firefox profile and it does not work. Following the steps in all of the active questions regarding this issue among other users have yielded no results. Nothing currently on the help site (which I've combed through for the last three hours) has helped. Most of the extensions I'm now trying to uninstall are old ones that stopped functioning/being compatible with one of the more recent updates of firefox. The rest are toolbars I've never used because they're unsightly and clutter up my screen * What I wound up doing was installing the newest of the newest versions of firefox (it's at 5.0 or something now, I think). That just made all the plugins, add-ons, and extensions I wanted to get rid of obsolete and it auto-removed them on its own.