In public repositories*

It’s an interesting view but it seems like the metrics themselves may be pretty error-prone with biases, and definitely cannot be used to draw conclusions.

browsers themselves are easy to make

That’s … a patently false statement.

They are among the most complex, difficult, resource hungry pieces of software out there along with actual operating systems.

There’s a lot of open source browsers out there. Are you using them? Probably not

This is also essentially misinformation. I’m sure none of us have heard of Firefox before, or Chromium. Sure Chrome (closed source) is what most people use, but Firefox isn’t exactly some esoteric browser.