How to Uninstall an addon in Firefox
Answer: You can uninstall an add-on in Firefox by doing the following:
1) Click on ‘Tools‘ located in the top menu bar of Firefox.
2) In the drop-down menu, click ‘Add-on‘.
3) In the small pop-up window, click on the add-on on you want to uninstall and then click on the ‘Uninstall‘ button.
Note: You will need to restart Firefox to complete the process. (if you just want to pause/stop the add-on for a while, please click on ‘Disable‘ rather than ‘Uninstall’.