Earlier quoted context omitted.
> Microsoft has spent more time and resources than any technology company in the world focusing on web related security. Mostly because they had to. If others spent less it could be because they had a smaller vulnerable surface to begin with, or simpler codebases.
You evidently haven't seen the massive codebases from the Mozilla or Webkit camps, or the huge number of vulnerabilities therein in recent years. IE is a huge piece of shit, but MS has done a lot for web security. Mind you, I think Google's efforts have been more fruitful, but writing off MS's effort is silly.
Microsoft did a lot, quite possibly because they had a whole lot to do. No other company has an OS that large (Windows is huge) so tightly coupled to a browser.