Sort of. IE was actually a big part of the reason developing Ajax applications was an expensive pain for many years.

https://en.wikipedia.org/wiki/XMLHttpRequest

https://en.wikipedia.org/wiki/Ajax_(programming)

The original idea came from ActiveX, but it didn't take off until it was implemented across browsers via JavaScript as XMLHttpRequest over the next 6 years, and didn't become "Ajax" until the Adaptive Path blog post about Google's innovations with Maps and Gmail in 2005. Microsoft then added support for XMLHttpRequest a year and a half later in late 2006 with IE7, which of course had very little adoption, particular among businesses, because of IE6 (see IE6 @ 49.8% and IE7 @ 17.1% IE market share at beginning, March 2007, of this graph: http://www.w3counter.com/trends).