Firefox FUD not lagging
Five years ago, most Windows users were only aware of IE as a web browser that was available to them. Since then Firefox versions 1, 2, 3, 3.5 and 3.6 have altered the landscape forcing Microsoft to innovate IE in versions 7 and 8 and creating new competition from Apple Safari and Google Chrome.
While Firefox still trails IE and isn't likely to ever regain the dominant status that its predecessor Netscape once had, it is still by most accounts and measures the number two browser (by market share) in the world.
Can Firefox's innovation and growth curve continue?
In a comment attributed to former Firefox developer Blake Ross, apparently not. Ross allegedly thinks that Mozilla has become too passive in order to release products quickly. I personally don't agree with that assessment of Firefox.