I don't think what you are talking about has happened in the last 10 years. And it was only bugs/deficiencies back before. Browsers are incredibly careful, bet

I don't think what you are talking about has happened in the last 10 years. And it was only bugs/deficiencies back before. Browsers are incredibly careful, better designed than OSes. For example, browsers all shipped protection against spectre/meltdown within weeks of the vulnerabilities being revealed. Browsers are extremely conservative & some of the best engineered sandboxes on the planet. If you could link to something, anything describing what specifically you think the threat is, what problems there are, I'd be most appreciative. This fear-centric conjecture you are spreading does not match what the intent of the browser is, which is to provide a tight secure sandbox such that a user can navigate anywhere at all and have a safe comfortable predictable time.