They did lead on with some very cool ideas like panorama (now tab groups, still a Firefox exclusive feature!), Ubiquity, ... The problem is that they killed them with the rest (and got the good people behind to leave).

With regards to be a good "community leader", it sounds like it might be true for the devs, but it is completely false with regards to its user base. Pocket and other commercial moves were made in a very underhanded way that angered many, for good reasons, and they repeated these types of mistakes many times over.

Since a very long time the worst enemy of Firefox has been Mozilla, let's hope it changes.