I've never seen any indication that anyone
wants Mozilla to fail.
But after seeing several years of repeated strategic blunders and bad management, and Firefox slip from being the most popular web browser by a comfortable margin to a single digit percentage market share, which is still sliding down, I think the available evidence shows that they have failed quite badly, and for the most part through problems of their own making. Now, I'd like to use Firefox again, but they have regain strong technical focus first. They are all over the place doing irrelevant stuff. I'm surprised they even have that many staff to lay off in the first place given their financial situation. There must be a large percentage of non-jobs amongst that thousand, because they certainly weren't all dedicated to making a good web browser.