

Closed source browsers are rare today, and even those are built on the open source browser cores.
Any browser that’s not Chrome is rare today. I’m not sure pointing at Chrome as a well-managed open source project is a good idea. Although one can view the source, Google controls the codebase and development process with an iron hand. Any feature that is a good idea technically, but will hurt Google is a no-go to have merged.
Freedom comes with uncomfortable ramifications. This is inescapable. Freedom includes doing things that a given individual isn’t comfortable with. If you’re not happy with this trade-off, don’t use a license that allows “any” usage.