Didn't think I had to say it explicitly. As far as influencing Mozilla's course, I don't believe those to be very helpful methods. A fork may be helpful, but it highly depends on the developer(s). I argue against the second one all the time. Third is laughably counterproductive.

Mozilla is capable of responding to (esp. proper) feedback. For example, regardless of what you think about the subject, the community sent a pretty clear message when they started accepting cryptocurrency donations, which I'm sure they're still keeping in mind to this day.

Point being, engaging with them is one thing that helps and I can do just fine. No need for "endless doom screeching."

Re: positive news. Yes, on paper it can. We'll see how it turns out in reality. I've explained why I'm not immediately into it, though your comment seems to ignore that part of mine. I do want it to work out though, if for no other reason than because what's done is done and ultimately, I just want Firefox to thrive.