Found in

• Firefox 103.0b1

Affected versions

• Firefox 104.0a1
• Firefox 103.0b1
• Firefox 101.0.1
• Firefox 91.11.0esr

Affected platforms

• macOS 11.6
• Windows 10 x64
• Ubuntu 20.04 x64

Steps to reproduce

1. Make sure to have a couple of addresses saved
2. Open Firefox -> United States(US) en-us build locale
3. Go to https://vimeo.com/enterprise/contact-us
4. Double click on any of the field to trigger autofill
5. Click on any of the field to trigger autofill menu

Expected result

• The autofill menu should be triggered easily

Actual result

• The yellow highlight is gone after clicking twice on any field which makes the autofill menu not to be triggered easily

Regression range

• Not a regression.

I guess this is because after autofilling, the form adds a new element (Website in this case). When a form is updated, we cleared all the previous states, including states that record those fields have already autofilled. Since we don't really treat this case not autofilled anymore (The autofill yellow background is still there), I think we should "migrate" some of the stats of the old form to the updated form instead of simply clearing everything.