I really wish there was a GPL-licensed rendering engine and browser, accepting community funding, with some momentum behind it.

I feel Ladybird have correctly identified the problem - that all major browsers and engines (including Firefox) get their primary source of funding from Google, and thus ads. And the donations and attention they've received show that there is real demand for an alternative.

But I think the permissive license they have chosen means history will repeat itself. KHTML being licensed under the LGPL made it easy for Google to co-opt, since it was so much easier to incorporate into a proprietary (or more permissively licensed) codebase.

There is Netsurf, but the rendering engine understandably and unfortunately lags behind the major ones. I just wish it was possible to gather support and momentum behind it to the same extent that Ladybird has achieved.

even when there are 'no options', there are always options

I used to be partial to Konqueror in the past. I wish it was still actively maintained and developed.