Yesterday my Firefox browser updated after I turned my computer on, and this usually doesn't cause a problem with my add-ons and settings. However, today when I came online, my PC toolbar wasn't working properly. Instead of showing icons for mail, weather, etc it's just blank. When I tried going into the add-ons settings, I noticed all the check boxes for Facebook, email notifications, weather, etc are unchecked. I checked them and went to click on OK, but for some reason it doesn't do anything when clicked. Nothing happened and it didn't save my new settings. (see picture)

Can anyone tell me what's going on with my toolbar? I tried uninstalling and reinstalling, didn't work. I really like the toolbar because it automatically alerts me of new email...help?