My version of firefox has automatically upgraded to the latest version (couldn't even tell you which that is because I don't know where to find the about firefox info), and I don't like the user interface. I don't have the time to get to grips with a whole new way of working and am perfectly happy with the older interface as I knew where everything was. How do I revert back to the previous version? (As a suggestion, perhaps it would be better to ask people if they want to upgrade or at least give them the option of rejecting the upgrade after trying it, instead of making wholesale enforced permanent upgrades!)