Turns out "superior browser" is subjective. Firefox has great developer tools (the built in ones, not to mention Firebug). Firefox syncs nicely (and doesn't spy on what you sync). Firefox is easy to use.

For the vast majority of users, none of this stuff matters. What matters is brand recognition and stuff "just working". In-built Flash probably helps Chrome's case.

It doesn't matter which browser is "winning", the vast majority aren't picking which browser to use based on features. If Chrome is the "superior browser", why is IE dominating in market share?