How can you turn of an add-on off?
I added the Norton password vault add on and has screwed up all my passwords and I want to remove or uninstall it.
Opaite Mbohovái (2)
Extensions that do not have a "Remove" button are installed by other software and are not under control of the Firefox extension manager.
Such globally installed extensions are usually found via a registry scan or are installed in a location that Firefox scans for installed extensions.
Extensions installed this way need to be removed via the settings (options/preferences) of the program that has added this extension or you need to uninstall this program via "Control Panel > Programs".
In Firefox you an only disable such an extension.
I think you open the Norton Vault program, and look thru the settings.