Apparently, most people are happy enough with Chrome. If not, it would be relatively easy for a competitor to enter the market with a more attractive offering. And that's only because Chrome (and Firefox) are open source.

I'm sure there are many valid reasons to be critical of Google's business ethics, but keeping an important project like this almost entirely open source surely is not one of them.

Android, on the other hand, is a different case, with Google moving more and more basic functionality into the proprietary Play Services and proprietary apps.