Firefox Community Forum

FF is offering up possible login names for a particular site I have used previously even though I have removed all related browsing history, form data, and cookies (and cleared the cache). What am I missing? Is it using stored history for unrelated sites to guess at a user name, or is there some other hidden history I need to clear?

I use an online retailer to buy birthday cards and gifts - Moonpig.com. Whenever I choose Paypal as my payment option, it logs me directly into my Paypal account without me entering any details. I have several Paypal accounts and want to choose which one to use. I have no saved payment details on Moonpig's site and having checked, they say that somehow my browser is logging me in automatically. That's Firefox and I want it to stop.

I have no issues with Firefox storing log-in details but I should be able to choose which Paypal account I want to use.

Any thoughts please? UF

Not sure I understand this.... I know all about the saved logins & passwords that I can find under settings and I use that list regularly. But sometimes I have a site that isn't listed in my list. Perhaps it's been a very long time since I used it etc...

But when I click on the user or login field for the site, a list of user names will appear and it's obvious that these are not related to this site. For example I'm on a specific site this morning and I see a list of 6 user names, including my regular email address, another email that I sometimes use, 3 variations of a common user name I use, and a long number.

If I go to the saved password list and search for this site, it isn't listed. If I sort by user name, I can't really search for the usernames that are more common but I can look for the long number and 1 variation of the user name

• Bulleted list item I see the long number and the site it's associated with and it's not this site.
• Bulleted list item I do not see the specific variation of the user name

So....

• Bulleted list item Why does the user name that is a long number appear in a list when I click on the user field at the website when it's associated with another website?
• Bulleted list item Why does a variation of the user name appear in the same list when it is not shown anywhere in the saved password list.

I've seen it happen many times and what's really strange is that on 1 site clicking on the user name field will bring up a list that contains unassociated user names and another website might bring up a different list of unassociated user names! Really strange. Where are these tidbits of information being saved?

Firefox does a good job of filling in username and password prompts. Occasionally, it doesn't. The sign-in prompt for American Airlines is an example. Go to AA.COM and click on the "Log in" button. The prompt box labeled, "AAdvantage® # or username", is not filled in; but the prompt box labeled, "Password" is recognized and filled in. There must be something about the wording or the HTML used for the first box that obscures the requested information.

Hi,

I am concerned that when I signed into my bank account today, the saved username which is autofilled by Firefox had been changed. The change was subtle -- from uppercase to lowercase letters -- but it wasn't me that changed it. This is a site I log in to often, almost every day.

Of course I am worried that this is some sort of hack.

something like this happened July 16, 2025 and I had to change my password It happened again August 23, 2025 And again Sept. 9, 2025 and I had to change my password Now it's happening again (after I updated the app) and as FF doesn't recognize my old password(s) I can't do things like see an invitation from an old friend because I can't sign in because it doesn't recognize my FF password. I'm on a 2021 iMac 24 inc, M1, 8GB, running Sequoia15.6.1 I'm afraid to update my OS because what if I get blocked out of my email. Apple just suggested I switch email apps. But I've been running Firefox and Yahoo (and several other accounts) for more than 25 years on a dozen or more devices and I don't want to lose that history (this happened to a friend who lost his entire gmail history. Yikes.;)