https://ladybird.org/
"We are building a brand-new browser from scratch, backed by a non-profit."
I am really sceptical that this is doable -- it is SO much work. And they have $1.1m at least, which is not nothing, but it's not *that* much when you're paying a team of full-time developers either. Still, I mentioned to people last week how I was sceptical (frankly, dismissive) about OpenStreetMap and I was wrong there, so I shall choose to be optimistic. Good luck Ladybird team. I'll try it.