How to remove or delete Add-ons in Mozilla Firefox Browser?
To remove addons from Firefox browser,
Step 1: Go to Tools→Add-ons or press Ctrl+ shift+A.
Step 2: Add-ons Manager Window will be opened in New Tab. Search the add-on in
add-ons search box and press Enter.
Step 3: Choose My Add-ons to view all the installed addons.
Step 4: From here you can either Remove or Disable the add-on.