You can create a password block exception for the involved domain to prevent Firefox from asking to update a password.

Thanks for your reply @cor-el. In that case, I'll have to have a whole list of websites in Exceptions which use the other domain login. Also, I pretty much use the same set of websites with both login IDs interchangeably. So having the websites listed on exceptions will cause more harm than help. Hope this helps.

Do you have this email ID problem with that many domains ? A block exception is only needed for websites that ask to update or store a new login and you already have stored the correct login.

Is this about the username field in the login form or about the host name where you apply this login ?

I think I don't understand your recommendation. I'll give an example - I need to save login credentials for website A. I have successfully saved the credentials with one email ID (say 123@xyz.abc.com). Now, I also need to save login credentials for the same website A with my other email ID (say 567@abc.com). However, when I type this other email ID 567@abc.com in user name field, type its unique password and hit enter, Firefox gives me a pop-up asking whether I want to update my credentials for email 123@xyz.abc.com.

At some point before, I said ok - update. So it updated my credentials for email 123@xyz.abc.com with password of other login with email 567@abc.com; which is not a desired result.

I think my original question is misleading - it's talking about changing password scenario; whereas I really need help with saving passwords for two different email ID based logins. Sorry for the confusion.

Just to be sure: Is this about saving two (or more) logins for the same domain (website)?

Do you only have one entry in the Password Manager and Firefox doesn't want to create a new login?

Note that you can double-click username and password fields in the Password Manager to edit these fields.

Also see the reply in your duplicate question :

https://support.mozilla.org/en-US/questions/1269238

Yes, this is about saving two (or more) logins for the same domain (website). I have only one entry in the password manager for this domain and Firefox doesn't want to create a new login.

If the usernames are different then I would expect that you can store multiple passwords. You can try to edit the name field temporarily to something random to see whether that makes Firefox prompt to store a new password.

Maybe this extension can save an extra login.

• https://addons.mozilla.org/firefox/addon/save-my-password/

I may be wrong, but this sounds similar to the problem in this thread :

https://support.mozilla.org/en-US/questions/1268637