Do you want one already very large company to be the only browser provider? That company could start to make its implementation less user friendly/less friendly

Do you want one already very large company to be the only browser provider? That company could start to make its implementation less user friendly/less friendly to competition; but users would have no alternative but to use it. e.g. "Let's track everyone's usage, and prevent adblockers". Not sure that applies to language implementations. Imagine if C++ started trying to send user data to some organisation.