Okay, I get rid of the Bing page (Thank you), but in the process I lost my bookmarks, passwords, and all of the Firefox customization.

I tracked it down to the profile having been wiped. And i was able to find the old profile. I just cannot restore it.
The instructions provided by Firefox are gibberish. They include Firefox menu items which do not exist, and ones
which do not do what they say they will do. A pox on Firefox. I am able to do the "Select Profile" thing and get all the
customization back, it just won't stay there. Next time I open Firefox they are all gone.

I found in my drive where the profiles are stored, and have identified both the profile with all of my goodies and the current profile.
I have also identified which file within those profiles hold passwords, which ones hold bookmarks, etc. Can I simply copy those files from the
good profile to the current one, overwriting the files in the current profile? Asked at Firefox help and have gotten no answer.

I'll bet someone here knows. I hope so. Thanks.