470k crashes in a week? Considering how low their market share is, that would suggest every install crashes several times a day... I gotta call bs.
67k crashes / day
claim: "Given # of installs is X; every install must be crashing several times a day"
We'll translate that to: "every install crashes 5 times a day"
67k crashes day / 5 crashes / install
12k installs
Your claim is there's 12k firefox users? Lol
Granted, they're probably just as accurate as netcraft. /shrug