is there anyway to see a screen shot of that system popup? if you didn't take any screen shot can you find one on google?
I must live in a different environment. We have a laptop that runs Win 11 22H2 Beta, a desktop that runs Win 11 Home, and an infrequently used laptop that has Win 10 Pro. All with Firefox installed and configured as the primary browser. Have not experienced and Windows cumulative updates that have modified any Firefox settings/configurations and have never seen a pop-up suggesting a change of browsers or search engines. The only thing I have experienced is going to the Firefox site from Bing to download Firefox and getting a prompt suggesting that Bing was the only browser necessary. Not a big deal.Now I'm getting pop-ups to switch my search engine to Bing in non-MS browsers. I'm starting to hate MS again.