Can you explain your question?
And it could be (depends on what you mean with 'supporting') that some versions of some browsers support more than other versions of other browsers. We don't know - of course - what browser you mean?
And some browsers have add-ons or accellerators. Those add functionality. We don't know either what add-ons and accellerators you installed in your different browsers.
So all I can say: nobody knows, except you. But that makes me wonder why you ask it.
and all the other information about it, like cookies support and others...
Anybody knows ??