How to undo "Enable autofill for [website]" in Firefox? My question is similar to [Undo &quot;Disable autofill for [app]&quot; one), but the solution doesn't work for me, so please bear with me.

I'm using Keepass2Android for autofill. It works great in most apps. It also worked in Firefox until one day I pressed Enable autofill for [website URL]. Now it doesn't work for this website. There's no autofill popup, so I can't undo this like I could in other apps. I've also done this in Firefox Preview and it stopped working altogether for all sites in that browser.

What I've tried:


Solution from this question - I don't have the 3 dots button
Reinstall Keepass2Android - no change
Reinstall Firefox - no change
Clear Firefox cache and data - no change


I'm using OnePlus 6T with latest OxygenOS (Android P-based).
External autofill apps change a certain boolean in the Firefox for Android configuration variables, this "setting" can nly set back to the old setting by completely uninstalling and reinstalling Firefox or better by changing it in: about:config


goto about:config
search for: dom.forms.autocomplete.formautofill
set it back to true
refresh your login window and... fixed!