CSS 3 - transition prefixes - which ones to use?

Question

I have a question regarding the CSS vendor prefixes for transition.

This source states that \"you need to use all the usual prefixes to make this work in all browser

Answer 1

Do yourself a favor and download Prefix Free. It's a minuscule JavaScript which lets you user pretty much any prefix-requiring property, without a prefix (including transitions, animations, and media queries).

EDIT: The only exception to all of this is media queries for Opera, where the pixel ratio (and nothing else) has to be expressed as a fraction rather than decimal.