Back up your Firefox profile BEFORE you use the Reset Firefox feature.If you are using MozBackup, follow this process: It is theoretically possible to simply copy the old profile folder instead and keep it as a backup, but the importing is not automatic then and you need to rely on option 2 or 3 instead to do so. You can use a program like MozBackup - only available for Windows - to back up Firefox data and restore it at a later point in time.
