"which to me is not true unless all the users who downloaded Safari are also using it as their primary browser" Market share is not calculated by the number of

"which to me is not true unless all the users who downloaded Safari are also using it as their primary browser" Market share is not calculated by the number of downloads of a particular browser. It is calculated by tracking the browser used to visit a particular website, or a set of websites. Net Applications, publishers of this particular fact, aggregates statistics across a large number of sites.