google/web-starter-kit — pull request #389 by devnook (2014-08-24 21:06:33+00:00)
Title: Slider

I'm adding FF styling to slider. There are 2 unresolved issues with FF implementation:
+ the slider gets inner focus ring when focused, which I cannot easily remove due to https://bugzilla.mozilla.org/show_bug.cgi?id=851777
+ the -moz-range-thumb pseudo-elements do not get animations in FF :(
Other than that, it seems usable in FF.