Don't be let down by other comments. The topic itself something I think people would more enjoy when it is more comprehensive. Add more content with your findings, refine and then post again on HN
Honestly it is as simple as for them to realize that people are still using firefox because they WANT to. And I believe most of these people would be glad to pay a monthly/yearly fee for a stable, secure and private experience.
I would like to come back to Firefox. But lack of focus on their core product (vertical tabs issue) and trying to woo chrome(ish) users with crappy products have turned me away long back.