Just tonight we briefly mentioned garage doors and remote garage door openers, and we got an ad on FB for remote car openers. We haven't looked up any of these things online or anything else, it was a brief discussion that lasted all of 1 or 2 minutes, tops. It's definitely not cross platform tracking, it's got to be microphone listening. I advised her to uninstall FB from her phone, because this is getting obnoxiously creepy.