This list includes a bunch of Internet Explorer-proprietary properties, but none of the browser-specific properties from other browsers. Was that intentional?

No, not intentional. -moz and -webkit properties should be included here too.

Added all the -moz properties I could find that can affect HTML elements. A few seem to be XUL-specific. Will work on adding test cases for all the possible values and updating the compatibility charts.

No Opera in CSS compatibility tables?! This is just unuseful...

Can we have a quick note if something is browser specific on this list, eg ie only, Firefox only, opera only.

The -webkit CSS properties are missing

it is very useful for web designer.

The MS-only propreties sould be in a separated section. Ones for pre-implementation of CSS3 (-webkit-, -moz-), too.

Non-Standard compliant CSS properties should really be separated from the core... Google doesn't generally care much about Standards, but if this effort is truly meant to be used by web devs, I'd say you can't really ignore Standards this time...

+10 :D

Why Opera browser is always discriminated by Google? Opera is the fastest browser on earth and Firefox stole too many features that Opera has built-in, without plugins...

The list should be separated by sections and categories. It will be nicer if it also separate proprietary CSS for different browsers.