If you're just looking at browsers, then how about Microsoft, which still has a dominant browser market share. If we're looking at desktop operating systems, A

If you're just looking at browsers, then how about Microsoft, which still has a dominant browser market share. If we're looking at desktop operating systems, Apple and Microsoft are the main suppliers. They provide built-in support for H.264, not WebM or Theora. However, when looking at content providers, Apple is a very important player. The majority of online video content is sold through the iTunes Store. And rental places like Netflix and Hulu also rely on H.264.