Profile issue is currently discussed here, feedback needed : http://boards.openpandora.org/index.php?/topic/5822-firefox-80-beta-3/

I'm having the same problem as Lomaxx... Missing profile.

There seems to be a problem with the ownership of the files in the pnd. pnd_run-logfile says something about files being inaccessible. I tried to change some files owner with chmod, but so far didn't make it any further yet.

Tried again. This time I get further, but it's still not running. A firefox-window pops up titled "Profile missing" showing the text " Your firefox profile cannot be loaded. It may be missing or inaccessible." I also removed my appdata-folder to start with a clean installation.

Try again. You may have to delete the old one though.