I don't understand the graphs. Chrome's growth seems to be slowing according to the raw data part of the graph, yet the trend line suggests Chrome's growth to be speeding up. The trend line basically doesn't seem to fit the data at all in the case of Chrome, aside from the fact that both point more-or-less upward.
The author is right that Chrome has a massive share, but everyone knows that. Any analysis more specific than that requires more than just overplotting exponentials on a graph.