What irks me about these comment threads is that people hold Mozilla to a standard that nobody holds Google to. The negativity spiral, deserved as it may be, seems to then tip a lot of people (self-proclaimed) towards going with Chrome when that is still the worse option. Looking at Firefox' market share, I feel bad for the shit it gets and what it has to pull to try and stay relevant (.: to pay the devs). At the same time, I would also not mind an unmozillad firefox, perhaps in exchange for a certain donation amount per year.
I currently don't donate much to Mozilla because they keep making the experience worse time and again (I'm still salty on a daily basis because the new mouse gestures "extension" is crap compared to the "add-on"-based one from before Firefox 57), because donating adds your email address to their spam list, and because I can't tell them to spend it on useful things like Thunderbird and Firefox rather than developing yet another VPN frontend or buying Pocket. Having a Firefox subscription that gets rid of their ads would not limit what they can spend it on, but it would send a clear message of what it is that I'm wanting to pay for. Wouldn't solve all problems but I wonder if this might help.
Money donated to Mozilla isn't used to develop Firefox: https://foundation.mozilla.org/en/
I'd be fine paying or donating to help Firefox development, but I can't.