Unfortunately, it sounds like Firefox has been replaced by the Snap version on your system (this sometimes happens unintentionally because Ubuntu pushes its Snap packages).
snap list
You get a list with all snap packages.
These threads may help you:
Yesterday Firefox destroyed all my bookmarks and extensions for no reason at all.
Today when I look in software centre it looks like the installed Firefox is a snap. I don't remember installing a snap of FireFox I'm pretty sure it was zorin repo version.
Anyone else having a similar problem.
Also can't get web app to work with this version keeps telling me the following.
[Web app warning]
I don't think it's profile problem!
It's happening frequently, when updating (apt update & upgrade), terminal says 1 downgreaded which is firefox. Then somehow it switches to snap and I start seeing the big delay in app opening time. I keep important tabs, groups & sessions opened and every time this happens, i loose the session.
Here are some data about firefox, even though IDK how much it helps..:
fahim@zorinOS:~$ which firefox
/usr/bin/firefox
fahim@zorinOS:~$ snap list
Name Version Rev …