It's not just you - this is precisely the word that I was coming in here to comment about.
Firefox is still my primary browser, and I still think it's the "most free" and potentially most "featureful" one left (even Chromium is subject to Google's whims and reluctances - as an example, in my case I find it irritating that Firefox has had native .opus support for <audio> tags by default for over a year, while Google only implemented perhaps six months ago...and still has it disabled by default. Apparently they're not turning it on by default until their glacially-paced project to make "webm2" with opus audio is finally finished.)
Mozilla feels like it's turning more an more into a corporation more worried about "market share" than its original mission. Reading about how it's a "fun" browsing experience seems like those commercials of "fun to eat" junk food. It's marketing crap. I fear their "mission" may soon no longer be "promote openness, innovation & opportunity on the Web.[...]so people worldwide can be informed contributors and creators of the Web" but "making the Web the leading platform for the greatest number of users and developers" (i.e. it doesn't matter how open or participatory it is as long as it has the largest number of consumers).
I hope I'm wrong. It's possible I am - Mozilla DID throw quite a bit into development of the opus audio codec, which is the clear winner for performance, quality, AND freedom-of-participation (and seems to have a decent chance to take off as a real standard, despite Google's foot-dragging, Apple's terminal "Doesn't Play Well With Others" problem, and Microsoft's inability to keep up with the times), and they ARE throwing real effort and money into daala to be the video codec equivalent. These are awesome, and perhaps the problem is just that every time they poke their heads out they get shouted at by people who feel changes to the user interface are horrific insults, so they've taken to just listening to each other. ("Hey, General Public, do you think our browser is 'fun'?" "STOP CRAPPING ON ME AAARRGGGHH!!!" "Uh...okay, hey, just everyone who's getting a paycheck from Mozilla, do YOU think our browser is 'fun'?" "Oh, of course! It is the MOST fun, boss!" "Okay, tell marketing to go with that.")
 https://blog.mozilla.org/blog/2013/11/05/mozilla-otoy-and-autodesk-work-to-deliver-high-performance-games-and-applications-on-the-web/ (2013-11-09)