Ever have an annoying situation in Firefox where you start filling out a form, but when it helpfully tries to finish your typing for you with some personal information, you see a typo in there? And you think, “Woah, that’s wrong — I don’t want that text ever popping up again.”
Well, here’s how to fix it.
Next time you see the auto-complete entry appear, try this: press the down arrow to highlight the entry you want to remove, then press Shift+Delete. The entry disappears.
This works in the address bar as well!
Note: The saved text will return if you enter that text again — so either don’t make that typo again, or consider disabling Firefox’s form-fill feature under Tools | Options | Privacy | Remember what I enter in Forms and the search bar.