I run Firefox on a Macintosh. I have Notifications always active in my Macintosh menu bar (upper right corner). Suddenly without warning, and without me doing anything, I got two notifications both saying: "Firefox is downloading from OneDrive". No indication of what was being downloaded, to where, or why, or why now. In fact at the time, I was working in Excel not Firefox (although Firefox was up, just hidden). OneDrive was up also, but in the background doing its usual syncing stuff. I checked Tools --> Downloads. I got the message: "There are no downloads." What the hey? Considering Firefox is a Mozilla product, and One Drive is a Microsoft product, I'm not sure how they can even talk to each other. Should I be concerned? Is this a virus? How can I find out what was downloaded, where it went, and why did this happen? Hope You Can Help.