This issue affects me. I have resorted to the practice of creating entries likeURL: https://fake.url.for.app.foobar.comusername:xxxpassword:xxxEither when firefox does not offer to save a password I enter into an android app, or when the password is ...
I am also suffering this issue of needing to copy/paste credentials because I cannot edit the URL.If it is too hard to allow editing URLs, perhaps make it easier to create a new (duplicate) saved login with a new URL.