> how many designers I interviewed who told me they used the Arc browser

Looking at their frontpage the design is outright horrible if you have a > 7-8 inch screen. I guess in a way its good to have an example of what not to do.

> I'm sure they'd be killing it

Why, though? I mean the niche is pretty small, most people don't care much about open source or even what browser they are using at all.

Considering the overwhelming majority of Mozilla's funding is coming from Google and in no way could it survive without it being run by Google's plants is not that surprising.