The best way to vote against changes like this is to use Firefox. The people who govern the project will pay attention to market share much better than anything

The best way to vote against changes like this is to use Firefox. The people who govern the project will pay attention to market share much better than anything else other than forking the project. I think you may have some core assumption that open source software has a voting system when none really exists and it’s either a committee or a corporation that gives no voting rights whatsoever. Participation instead gets things in when your are both trusted and the governance approves.