[_kwef]

Just a quick note; the market share decrease is relative to FF's original market share, in 2008. This may seem obvious to some but its really easy to get confused about absolute/relative changes when talking about percentages of percentages.

[csdvrx]

Relative is all that matters. A rising tide lifts all boats.

Microsoft has grown faster and larger than Google from 2013 to 2013: 1000% compared to Google 400%

Firefox relative market share down by 90% is a ripple effect of Google generous donations, creating a disincentive for innovation.