My Firefox add-ons (extensions and themes) have disappeared from the browser. They are all still listed as installed in the add-ons box under the Tools menu, but none of them are usable. All of my bookmarks are present, so I don't think I've completed deleted my profile. Any ideas? Thanks.
Some firefox add-ons aren't portable.
So Mozilla Firefox, Portable Edition doesn't have support for all add-ons.
This is nearly always due to some minor corruption of the profile... usually from an unsafe eject or a faulty USB port. To fix it, Go to the FirefoxPortable\Data\profile directory and delete the extensions.rdf, extensions.ini and extensions.cache files. Then restart Firefox Portable. Any extensions you enabled will be re-enabled but otherwise it should work as expected. You may wish to backup your profile first just to be safe.
Sometimes, the impossible can become possible, if you're awesome!
Thank you, sir. It worked like a charm. All corruption should be so minor. BB