Okay, so it's really not a "logo," per se, but it's a very fitting emblem. Well, wait, what's a logo, anyway?
According to the font of all knowledge -- Wikipedia -- a logo is described as:
"A graphic mark, emblem, or symbol commonly used by commercial enterprises, organizations and even individuals to aid and promote instant public recognition."
Well, then I guess Firefox's new logo is indeed a logo. Only thing is, they didn't choose it -- I did.
Without further ado, HERE IT IS!
Even though I personally have chosen this as Mozilla Firefox's new logo, I feel it accurately depicts the browser and, well, anyone who uses it knows it definitely is recognizable :)