In my opinion, web browsers have become too popular and widespread. They're an important application on nearly every phone, laptop and desktop computer sold. The pressure to implement pervasive tracking is immense. I don't see a future where companies like Google, Microsoft and Apple all decide to drop this level of tracking and switch to an open-source product.

If another browser engine is good enough they might _fork_ it in order to add these kind of predatory features. Kind of like they already did with WebKit, now that I think about it. :-P