One of the facts of the case is that Microsoft got as close to the standards bodies as it could, and part of its marketing was that it was making IE more standards compliant than Netscape. This is actually very common in computer history (the market leader does whatever it wants to innovate, while the losers band together around standards).

In the end, of course, it didn't matter. Microsoft out-programmed Netscape and then Netscape made several disastrous decisions that amounted to browsercide.

As I said, if you've got any evidence, I'm interested. Specifically, what did Microsoft add that was non-standard and that Netscape couldn't have added?

As far as I know, not even ActiveX qualifies. I discussed this with Mitchell Baker, and she clearly said that Mozilla could have implemented ActiveX if they had wanted to.