Earlier quoted context omitted.
> I hope people here never stop bitching about Firefox. Its getting harder and harder, at some point they'll deprecate their last sane ESR, and we'll all get stuck with all their junk.
This is exactly and precisely why open source exists, for both the "never upgrade frozen version" case, and the extension into "fork it and make your own" case
I'm not paid full time to work on a web browser. As a volunteer, I can't find the time to dedicate to that. I could do a few lines here and there if I really got dedicated, but like most people, I have a life. I have kids and such. My retirement account won't fund my midlife crisis to quit my job and work on a web browser, so I depend on something to build a good browser. And that is assuming I even would work on a web browser if I could afford to do whatever I want full time. There are a ton of other activities in my community that need volunteer help, some of which I'm helping a little bit, but I could do more for.
I, like many here, have wished that we could donate a small amount to Firefox every month to fun development, however it turns out that the Mozilla Foundation does not fund development of Firefox and so any money would go not to Firefox but to other causes of which I may or may not support but are not a web browser which is what I want to support.