Firefox doesn't save my toolbar configuration

If I add or remove buttons from my toolbar, then restart my firefox, it just goes back to the previous settings and doesn't save the changes I made to the toolbar. This also applies to addons I've installed. I've downloaded a screenshot addon and when I installed it, it appeared in my toolbar, but after I closed Firefox and opened it again, it was gone. Sorry if this is sounding redundant, but I'm trying to be as detailed as possible to get the best possible solution to this. All the settings to my status bar save, just not my toolbar. If you need more information, please ask. I'm really hoping to get this fixed. Thanks.