@leocg Hm, how would I know ...
In the file, it says Password and then my password follows. (There are some weird characters around that, of course.)
Clearing the data was no problem, thank you all.
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@leocg So, the verdict is that I must have typed those adresses (altthough I have no recollection of it) between now and 2015 (when the file was created), and somehow this information has now suddenly been pulled up, from one day to the next.
Thank you, I guess this is about it.
@leocg I have located the file, where the email adresses are stored.
The file name is "Web Data" and its location is:
"C:\Users*_*\AppData\Roaming\Opera Software\Opera Stable".
(The file lists my instagram password in plain text, for some reason.)
Can anyone tell me how to make sense of the content of this document?
@leocg I have never even typed those email adresses on the computer, let alone used them to log in anywhere, using them as usernames.
I have checked the saved passwords in opera nonetheless, there is nothing there.
Two of the freemail adresses are totally nondescript, i.e. not containing my name, they have been cancelled 10 years ago (my computer is younger than that).
The two work email adresses, which have been discontinued 15 years ago, list my surname only, a surname I have changed 13 years ago. Information about that employer has not been entered on facebook.
Google search doesn't bring up anything that would suggest freely available (and current) data has been used.
@sgunhouse So I will have to take the matter to facebook?
I used other browsers on another machine to test it and the autofill at facebook doesn't list those adresses, but another one I am not using for facebook. So I assume it may be information stored on that particular computer.
Is there a way to read out the actual information stored in cookies in opera?
Opera: up to date
Windows 10: up to date
Today, when I wanted to log in to facebook, the username field suggested 3 email addresses with freemailers that have been closed over 10 years ago. It also suggested two email addresses from a company I was with from 2001 until 2003, so those email adresses have been discontinued 15 years ago.
I always thought these autofill suggestions are browser-side, not website-side.
Can anyone explain, how this may happen?