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How to Uninstall

Hey!

You never need to reinstall Firefox or reset Firefox, just to remove FF Ultima (and most css themes). This action is excessive and waste your own time. I would also hate to make a situation where someone has to do that, so if you ever need to "reset" or remove the theme... Just delete the files in your chrome folder.

Two ways to uninstall the theme​

If you disable userchrome, firefox will stop interacting with the chrome folder (theme files). Or if you delete the chrome folder (or everything inside of it), firefox will have nothing to be themed with (since the theme will no longer exist). The Setup Wizard handles this all with one click. But choose whichever method you prefer:

Uninstall with Setup Wizard​

  • Open the setup & click Uninstall
  • This will delete the theme files from the chrome folder
  • It will also completely remove userChromeJS

Or Disable FF Ultima​

  • On the about:config page
  • Set toolkit.legacyUserProfileCustomizations.stylesheets to false
  • This disables the theme (by disabling userChrome css)
  • Restart Firefox

Or Manually Delete FF Ultima​

  • Delete the chrome folder containing the theme files
  • Restart Firefox

VIDEO TODO

userChrome Companion​

userChrome Companion can be removed like any other extension. Although if you want it to completely remove all of the themes mozilla preferences from the about:config page. Go to Settings > Data > Reset userChrome Companion.