I can't enable or disable my add ons, in Safe mode or regular.
Today I upgraded to 4.0 but then downgraded again when I couldn't use my Norton toolbar or IDsafe, and my performance on other sites suffered. Now I am attempting to get my Norton toolbar back with the old 3.6, but can't enable the add on. I can't enable or disable any of my add ons, they simply return to previous setting when I restart Firefox. I have tried in both Safemode and regular. Please help.
Today I upgraded to 4.0 but then downgraded again when I couldn't use my Norton toolbar or IDsafe, and my performance on other sites suffered. Now I am attempting to get my Norton toolbar back with the old 3.6, but can't enable the add on. I can't enable or disable any of my add ons, they simply return to previous setting when I restart Firefox. I have tried in both Safemode and regular. Please help.
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This can be caused if one of the files that stores details of installed extensions is corrupt.
- Open your profile folder, for details of how to find it see https://support.mozilla.com/kb/Profiles
- Close Firefox
- Delete the following files if they exist, extensions.cache, extensions.rdf, extensions.ini and extensions.sqlite
- Re-start Firefox, it will then rebuild the list on installed extensions
This fixed my problem immediately. Thank you!