Comment by coldtea

>* Internet Explorer standard compliance : Internet Explorer has introduced an array of proprietary extensions to many of the standards, including HTML, CSS, and the DOM. This has resulted in a number of web pages that appear broken in standards-compliant web browsers and has introduced the need for a "quirks mode" to allow for rendering improper elements meant for Internet Explorer in these other browsers.*

For one, this wikipedia page is incorrect (shocker, I know). The "quirks" mode has little to do with "proprietary extensions" in IE, and more with stuff like incompatibilities due to MSs early adoption of standard syntax that later changed.

Second, all browser vendors have introduced "proprietary extensions". Heck, Javascript itself was a proprietary Netscape extensions, as were tons of other stuff we take for granted now. Oh, and this AJAX thing? It started as a proprietary IE extension. Not to mention the Canvas and CSS animations (which started as proprietary Safari extensions).

2. Seems legit (if another example of "ancient history", that didn't even matter in the end).

3. The consortium that had those patents seems to include all major players (even Apple, Blackberry, Sony et co). So not really singling out MS in this.