Broken in FF 16.0.1+

[blindmikey]

Firefox 16.0.1 and up has added support for the non-prefixed 'transition' property.

[blindmikey]

(Seems to be) Fixed with replacing line 80 with:

    var ua = $.browser;
    if ( _propsObj['transform'] != 'transform' || ( ua.mozilla && ua.version.slice(0,3) >= "16" ) )