I suppose now is a good time to ask if there are any good _non-corporate_ open source browsers out there?

Seems to me that businesses operate within an incentive structure that will always encourage them to take maximum advantage of users and do anti-user things no matter what their original goals were. The non-corporate part is key imo (see Canonical, Mozilla now etc.)

On Gnome, "Web".

On macOS, Safari may not pass your "non-corporate" requirement, but it's spiritually non-corporate, and functionally "just a browser". It's also wicked fast and extremely light on your resources.

On many platforms, "ungoogled-chromium" may satisfy your needs. It's under the name "eloston-chromium" in many repos. https://github.com/ungoogled-software/ungoogled-chromium