You can customize Firefox to suit your needs. Review this free lesson to learn all about customizing Firefox.
If you don't want to keep an extension or theme, the Add-ons Manager allows you to disable and even remove your add-ons from Firefox.
To manage add-ons:
- Click the menu button in the top-right corner of the browser, then select Add-ons. The Add-ons Manager will appear.
- Click Extensions to see your installed extensions. From here, they can be temporarily disabled or removed.
- Click Appearance to see your installed themes. From here, they can be temporarily disabled or removed.