Blech! Everything changed. My desktop, toolbar, icons. Then I open Firefox and all settings, passwords, bookmarks, etc are gone. Before I opened anything else, I switched users.
I didn't realize the settings on this laptop were mine. I thought they were just in the computer itself.
I think for the future I will log in as me. IF that popup pops up, I will jot down where I was, switch user to admin, then return to that page.