I can't believe how hostile everyone is. You may dislike Mozilla, but they're doing a hell of a lot more to respect users and promote an open internet than Google and Microsoft
Saying that they are doing a lot more than Microsoft and Google is to say they are not actively hurting an open internet. I don't think this is even true, Mozilla year after year burns millions of dollars on random unrelated projects while watching its market share slip more and more. The management at Mozilla have effectively killed the browser duopoloy, and probably ensured a permanent chromium environment.
I struggle to think of anyone who has done more than Google, FWIW.
Chrome made JS viable, as opposed to Flash/ActiveX everywhere.
I struggle to think of anyone who has done more to hurt the open Internet than Google.