Everytime I try to open Firefox, I get the message that the profile is missing. It may be inaccessible or missing. It appears that others have had this problem, yet nothing in the help questions have solved the problem. I really do not want to switch to Explorer. I might have to move to Chrome if you can't help me.
OK, that worked. I'm still having trouble (even following the links you posted) to transfer my bookmarks. There is a folder on my desktop that is labeled with Old Firefox Data. How do I get my bookmarks from there (I cannot click on them to open) to my "new" profile.
You need to copy the place.sqlite file from the "Old Firefox Data" folder on the desktop to the current Firefox Profile Folder or restore the bookmarks from a JSON backup in the bookmarkbackups folder.