What percentage of browsers in use are now HTML5 compatible?
Somers: “The stats change daily. I’ve recently seen claims that 50 percent of the browsers out there are HTML5 compatible, and 26 percent of the web’s videos are HTML5-friendly (mostly H.264, according to Softpedia). Again, remember that HTML5-compatible doesn’t mean any agreement on the codec. Firefox, Chrome and Safari can be compatible (although they may use different codecs), as will Internet Explorer 9. Thinking of the fact that we’re only now getting away from needing to test for IE6, we shouldn’t expect broad compatibility quickly.