Microsoft had won the browser war, but at the same time the dotcom crash and antitrust action over the tight integration between IE and Windows caused Microsoft to stop investing in it.
I don't agree IE6 was trash at that time. It was much better than the competition. IE was much faster and less resource intensive than Netscape, which was a big deal when RAM was measured in megabytes. It's not fair to compare it to browsers which came out years later.
Did they ever invest much into it? As far as I understand they got the core components from Spyglass Inc. and avoided paying licensing fees by giving it away for free.
> Feels like when Microsoft licensed Mosaic from Spyglass to become Internet Explorer, and a chunk of the compensation was tied to a fraction of revenue from Internet Explorer. Of course Microsoft gave IE away as part of Windows so IE never had any revenue associated directly with it.
Eventually MS did settle a lawsuit brought by Spyglass for $8 million to make the issue go away