That Firefox's market share will soon slip isn't a point, it's a prediction. His prediction has an argument behind it, but it's an argument with many assumptions; it's based on belief and prejudice.
Which is fine, as long as everyone recognizes it as such. His prediction and reasons for it may turn out to be true, but there's no way now to know if that's the case.
Which is fine, as long as everyone recognizes it as such. His prediction and reasons for it may turn out to be true, but there's no way now to know if that's the case.