ACPI errors rarely result in a no boot issue. Let's let that sit a moment and see what happens. You were able to boot it before - when you saw the File Manager with the missing folders in Sidebar.
If this was me, I would check the contents of the other HDD and make sure that my documents were safe- then perform a Reinstall of Zorin OS at this point, though.
This is consistent with your Home Directory having been moved / disturbed. Firefox stores its data in the Home directory in the ~/.mozilla folder.
Have you checked your other HDD to see if the Home Directory you moved there is intact? IF so, copy the directory to your Zorin OS /home/$USER directory.
I see that your home folder is locked due to permissions - undoubtedly from the moving it back and forth.
A chmod command would likely resolve this.
I have no idea why you have a home2 folder - I speculate you named it that as a copy?
It is 1:23 am my time, here. Honestly - this is a fresh install and you have backups of your home directory due to the copies you made. I highly recommend that you save those copies in a safe place - then Reinstall Zorin OS.
That is the safest method to untangle what was done.
During the Reinstall, you can use @swarfendor437 's Unofficial Guide of Zorin OS to partition a Home Partition separately from the system partition safely.