[OS:] I could reproduce it only on Mac. [Versions tested upon:] 52.0a1 2017-01-17 53.0a1 2017-01-17 [Description:] Steps: 1. Go to https://www.unibet.com/ 2. Save 2 username entries 3. Delete all cookies (Go to Preferences -> Privacy -> From History choose "Use custom settings for history" -> Click on "Show Cookies" -> Remove All) 4. Reload the page from step 1 [Actual Result:] Credentials dropdown do not follow up with the form when that moves in page. [Expected Result:] Credentials dropdown should follow up with the form when that moves in page. Please see the attached video for a better understanding.

I found out another site where this bug is reproducible, on http://www.webs.com/. Just open the site and you will see the warning message covering the email address field.

This isn't a new problem with the insecure warning AFAIK so please don't make it block bug 1329333.