Why do you mean by "you"?
I bet there would be plenty companies who would give money to mozilla to improve their browser and at least answer their demands.
I don't really know the mozilla company as a whole and how it's managed, but in my view there might be some things that could be removed from mozilla, like trim the fat. I have the feeling a lot of marketing people have entered mozilla, and I don't like it.
I want an answer to the question "how many software engineers and UX people are involved in the process of developing firefox".
Just let users and especially companies tell mozilla what it wants in firefox, and go from there.
I don't know how many people are paid for the services like sync, pocket, VPN, etc, and if those services are profitable to keep them.