The developers of FireFox are in a state of denial; that rarely lends itself to dealing with reality-based threats very well.
Take the memory management issue -- the developers routinely say "There's no such thing." Or "you're using too many plug-ins and extensions." Or any number of excuses. I can hit the same pages with Opera as with FireFox, with less memory usage. And I'm not using plug-ins. The reflex nerd answer is "well, stop browsing that way!" That is a foolish thing to say, as it will cause me to switch to a browser where I do not have to alter my habits.
You can see that Internet Explorer's market share continues to drop, but as of late, it is not through growth in FireFox. It's from the adoption of other competing browsers. As long as the Mozilla Foundation is operating with the THERE ARE NO BAD PROBLEMS, JUST BAD USERS mindset, they'll continue to make more and more strategic blunders. Reliance on Google is one of them. Google has no friends, only temporary allies which may be either dispatched or eaten when it is convenient.