Let. Me. Pay. For. Firefox. I pay for other services online. I pay for VPN, for ElementaryOS, for Fastmail. Paying is fine. I pay, you give me a service that does not spy on me. It is not that hard.
Donating does not fund firefox. They "embezzle" it into funding all their other shit like internet censorship ("We need more than deplatforming" https://archive.li/U6aXc) Yes I did donate in the distant past.
And now I just learned about NextDNS. I'm going to pay for that. Back in the day, people were unwilling to pay for Netscape, and Mozilla was born. Today, the world has shifted again, and there are more than enough people with enough money willing to pay for software. And again, Netscape^WMozilla is late to grok this.