Website ERROR: 'webkitRequestAnimationFrame' is vendor-specific

Full error -

'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.

Museutils.js:5

-(this.$spacer.offset().top-this.pageMarginTop));var c=this.$page.outerHeight(!0),d=c-this.spacerHeight,a=Math.max(this.spacerMinHeight,b.height()-this.pageMarginTop-this.pageMarginBottom-d-a);if(a!=this.spacerHeight){this.pageResizeWatchEnabled=!1;this.updateScrollClass(a);this.$spacer.css("height",a);if(a<this.spacerHeight&&c==this.$page.outerHeight(!0))a=this.spacerHeight,this.updateScrollClass(a),this.$spacer.css("height",a);this.pageResizeWatchEnabled=!0}return this.spacerHeight=a}else this.pendingRequest=a};d.prototype.calculateInitialSpacerHeight=function(){for(var a=0,b=0;b++<20;){var c=this.doUpdate();if(c<=a)break;a=c}};d.prototype.onPageHeightChanged=function(a){this.pageResizeWatchEnabled&&this.doUpdate(a)};d.prototype.enable=function(){this.enabled=!0};d.prototype.disable=function(){this.enabled=!1};b.data("stickyFooter",new d("#page"))})(jQuery);Muse.Utils.requestAnimationFrame=function(){return window.webkitRequestAnimationFrame&&window.webkitRequestAnimationFrame.bind(window)||window.mozRequestAnimationFrame&&window.mozRequestAnimationFrame.bind(window)||window.requestAnimationFrame&&window.requestAnimationFrame.bind(window)||function(a){window.setTimeout(a,20)}}();Muse.Utils.animationFrameFx=function(a,b){var c=a.fx;a.extend(c,a.fx);var d,g=a(b).data("stickyFooter"),f=function(){d&&(Muse.Utils.requestAnimationFrame(f),c.tick(),g.doUpdate())};c.timer=function(b){b()&&a.timers.push(b)&&!d&&(d=!0,f())};c.stop=function(){d=!1};a.fn.animationFrameFx=c}(jQuery,this);;(function(){if(!("undefined"==typeof Muse||"undefined"==typeof Muse.assets)){var a=function(a,b){for(var c=0,d=a.length;c<d;c++)if(a[c]==b)return c;return-1}(Muse.assets.required,"museutils.js");if(-1!=a){Muse.assets.required.splice(a,1);for(var a=document.getElementsByTagName("meta"),b=0,c=a.length;b<c;b++){var d=a[b];if("generator"==d.getAttribute("name")){"2015.0.2.310"!=d.getAttribute("content")&&Muse.assets.outOfDate.push("museutils.js");break}}}}})();

This is the first time I have made a website with Adobe Muse and Dreamweaver from scratch. I'm not quite sure how to fix this Error. I would like you to note that I'm fairly novice when it comes to JS and CSS although I have the gist. It seems like whatever I do this error doesn't go away :(