I’ve given up with any attempt to stop any “spying” by anything. As soon as someone publishes a workaround they’ll change their method or embed it in something important.
I use a PiHole to stop the bulk of the incoming adverts, but TBH it’s Facebook that’s the worst and the PiHole can’t stop them. Since I’ve been on FB and got Alexa I’ve noticed a real move towards targeted adverts but they miss the mark as they’re almost always trying to sell me something I’ve already bought.