Did your IT keep a backup of your old user profile folder? Your Firefox settings are stored in there. This article describes the relevant locations for XP and newer versions of Windows: Profiles - Where Firefox stores your bookmarks, passwords and other user data.

If you can get a copy of your old profile folder, then you can recover nearly everything.

If not, unfortunately, without a copy of the Recovery Key/Sync Key, I don't think there is any way to break in to your Sync account.

Hi jscher2000:

Thanks for the quick reply. Unfortunately they didn't keep a copy of my old profile folder.

Thanks,

Hi Thetraveller, I should have stated the question differently, but perhaps the answer is the same: did they save a copy of C:\Users\username\ (or C:\Documents and Settings\username\) which would contain your Firefox profile folder. If not, I think they should, but...