I will start using Firefox when it leaves Mozilla and I'd pay a subscription for it. For me, the ideal situation is a lean team (hopefully only the devs, because I'm not paying any useless middle or high level managers a penny) start developing it for a fee. Just the browser will do, no password managers, no vpns, no nonsense. I already pay for subscriptions for those.
I've seen many here on hacker news expressing willingness to pay and the only reason that they don't is because they don't want to pay for other Mozilla nonsense but Mozilla doesn't want to open a direct channel for the community to support the Firefox team. I find this outrageous. Clearly, they are using Firefox, its very talented devs and the image of their noble fight for a private internet to fill the pockets of executives who don't know shit about engineering or the ethos of opensource software.