Type about:accounts<enter> in the address bar. [v57+] https://accounts.firefox.com/settings

https://accounts.firefox.com/signin https://accounts.firefox.com/settings

Thanks you. I have looked on the page you provided the link to. On this page, under Devices and App, a couple of devices are listed that have access to my Firefox account. But I know of one active device that (my second home PC) is not there. Therefore the list is not complete. True, I can add the active one I know about that is missing. But I'm concerned that others might be missing that I do not know about, for example, a PC that I might have sold at some time in the past. Thus, I seek an authoritative, complete listing. Is such a listing possible to obtain?

If you look at the listed devices, you will find an option to remove any listed.

Thanks for your response. The problem is that the list of devices you refer is not complete, as for as I can tell. My reason for believing it is not complete is that it fails to include at least one device (my second home PC) that I know has access to my Firefox account. Also, it says below "Missing or duplicate items?" which leads me to believe that the listing is not necessarily a complete one. Is there another way to find a complete list that might include devices I have forgotten or no longer have access to?

Try accessing that page from the unlisted unit.

Thanks for your response, but "assessing that page from the unlisted unit" won't work. I want to prevent units that (1) I no longer of have possession of, and (2) are not listed, from accessing Firefox account.

For example, a number of years ago, I sold a PC of mine that could access the account. I doubt I ever listed the unit on Firefox. I wiped the hard drive as well as I could when I sold it, but I might not have done it effectively. I am concerned the unit could now be used to access my account. I'd like to prevent that.

From your responses, I infer that there is, in fact, no way to do this: no way to create an *exhaustive* listing of unit that can access my account; no way to block existing units that (1) are not listed and (2) that have access and (3) that I want to prevent from having further access.

Anything can access the sync account. But only with its e-mail and password.

Thank you for your efforts.

Glad to help. Safe Surfing.

Devices that you haven't used for some time and that aren't connected actively may not appear in the list (i.e. they have expired) until you start this specific Firefox profile and initiate a Sync. Note that history expires after a few months.