If I understand you correctly you want to merge 2 accounts on Facebook.

That is not a Firefox Support Issue and you will have to take that up with Facebook Support.

Please let us know if this solved your issue or if need further assistance.

RooDoog said

Spectrum merged with TWC making my old email address obsolete. Bought new laptop and had to use new email. Now I have 2 accounts. I can no longer log into obsolete email so I cannot delete it. Old account has game info plus other bookmarks. How can I retrieve old info. No I did not sync or use any other saving feature. Help!

I can't follow this completely, so let me try to break it down:

#1: You cannot retrieve email messages from your old account

#2: You want to recover bookmarks from your old computer, but you never set up Firefox Sync

It sounds as though these issues are mainly caused by not having physical access to your old computer. Can you still access it in any way? If so, it's not difficult to move Firefox data between computers. Email is different: did you download your messages into a mail program like Thunderbird or Windows Live Mail? If you only used email in the browser, I think it would be the same problem on the old system as you have now.

Regarding "I can no longer log into obsolete email so I cannot delete it." I don't know why that's needed.

Old laptop died, no access. Using outlook email now.

I don't have any ideas for your situation. If you contact the email provider, can they assist or do they say you're out of luck?