Make a backup profile
In case you want to revert back for any reason, you should create a copy of your entire profile directory.
⚠️ Deleting the user.js will NOT revert any changes. ⚠️
(Just because all of the changes were stored in a user.js file doesn't mean your profile will revert back.)
Instructions
Open the profile folder
- To find your profile directory in Firefox, go to
about:support.
- Find the 11th item listed, Profile Folder, and select Open Folder button.
Copy+paste contents
- Close Firefox. Copy the contents of the folder.
- In Explorer (Windows) or Finder (macOS), go back a page to see all the Firefox profiles.
- Create a new folder, and paste the contents into it.
Name your profile
- Rename your copied folder to something meaningful, and keep the original name (for an easy rollback).
- For example, if the profile folder is called
ljgba71b.default, a backup copy might be called ljgba71b.default-backup or ljgba71b.default-pre-betterfox-userjs.
- Open the new profile folder and paste the contents into it.
- Close the window. You now have a backup profile! 😄
🛑 Always make a backup!