There may not be "a solution", but recognizing FUD for what it is, is a part of the "whole" solution.

If you don't have something to contribute (like a direction, suggestion, correction), then as they used to say, you are "part of the problem".

Shaming organizations into changing course sometimes works.

And even if it's useless that doesn't make it FUD.

I think when there's overblown criticism (does not take into account the positive things, seeks only to paint in a negative light), that's pretty clearly FUD.

Moreover, when there's a pattern of it occurring, for at least the past 5 years...

Not saying that firefox is perfect, I have issues with its project leadership too, but its nowhere near as bad as the (most vocal) critics like to claim.