I remember my coworkers (who were devs) Google searched Firefox to download and hit the first link which was an ad. It was a German version of Firefox with spyware.
Our IT department caught it but I was sorta surprised my coworkers hit the link as opposed to the first search term. That ad was active for a long time though … I think years.
I can’t remember which one of my phones, probably a Samsung that had Facebook installed and couldn’t get rid of it. People were like, you can just not open it or something. There’s a good reason I don’t want it on my device.