The AutoCorrect window will appear. Under “Replace text as you type,” add something you want to replace at the left and the text you want to replace it with at the right. Then, click the “Add” button ...
A user.js applies prefs in the order they are written. So, if a pref is listed a second time, then the second value (yours) would override the first (Betterfox's).
We recommend using the Chrome Web Store version as it's always up to date. Other store versions may lag behind in updates. User search may fail due to rate limit in Bluesky's API. In this case, please ...