use Mozbackup

FFus3r said

use Mozbackup

Thanks for the recommendation, but unfortunately Mozbackup does not work with Firefox Portable.

The least complicated method is to use the Sync service with a new installation of the official build of Firefox.

https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer

Set Sync up on Firefox portable first, then set up Sync up on the official version of Firefox.

the-edmeister said

The least complicated method is to use the Sync service with a new installation of the official build of Firefox. https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer Set Sync up on Firefox portable first, then set up Sync up on the official version of Firefox.

D'OH! Why didn't I think of that? Probably because this solution is too simple and too sensible... I'll give it a try - thank you very much!

Keep in mind that extensions which aren't hosted at the official addons web site won't be synchronized. They will need to be installed from their source.

If that does solve your question, please mark the post I made as the solution (Solves the problem).

Firefox Sync ended up working pretty well - as far as I can tell, all bookmarks, history, extensions, etc came over fine. There were only a couple of tweaks needed.

The only issue I ran into was some data from one of my cloud based services wasn't accurate, but all I needed to do was clear cache and cookies and everything looked fine.

Thanks for all the help!