This is what I came here to post, and you can see that, in the mobile chart, Chrome and Safari already seem to be levelling off. Maybe a better model would be like an ADSR (attack decay sustain release) envelope in sound synthesis where the logistic curve represents the attack / initial adoption phase, possibly followed by a mirror logistic curve representing mature saturation then eventual replacement by competitors. That said, some products do come back from the dead, like Mozilla itself; the Apple Mac is another example.
Saying "Chrome won" now feels like saying "IE won" in 2002 or so. Look at the chart here: