For some time the password-manager built into firefox presents for each website a long list with obviously not useful proposals: „Want to login into Amazon? Try the Azure-Password!“, Firefox whispers.
A bug couldn’t be more annoying, but this is a feature. (https://www.mozilla.org/en-US/firefox/71.0/releasenotes/)
Hard to believe this could be useful for some corner case, but for daily usage i’d prefer to get only the right password for one web-site to get proposed.
Fortunately you can turn it off:
signon.includeOtherSubdomainsInLookup := false
Thank you, i’v been thinking about switching to another browser. This is really a killer non-feature.