Fyrd/caniuse — pull request #280 by lozandier (2013-08-08 22:48:08+00:00)
Title: Included reference to a WebP polyfill for browsers with or without WebM support 

Provided reference to a WebP polyfill that's more all-encompassing in function; this particular polyfill enables support of the image format for browsers that currently do not support WebP with or without WebM/VP8 support.