diff --git a/node/utils/tar.json b/node/utils/tar.json
index 8813b776..aeafe23f 100644
--- a/node/utils/tar.json
+++ b/node/utils/tar.json
@@ -21,6 +21,7 @@
   , "chat.js"
   , "excanvas.js"
   , "farbtastic.js"
+  , "prefixfree.js"
   ]
 , "timeslider.js": [
     "jquery.js"
diff --git a/static/css/pad.css b/static/css/pad.css
index a71c5d59..e407b3a4 100644
--- a/static/css/pad.css
+++ b/static/css/pad.css
@@ -15,7 +15,6 @@ iframe {position:absolute;}
   top: 40px;
   color: #fff;
   padding: 5px;
-  -moz-border-radius: 6px;
   border-radius: 6px; 
 }
 
@@ -39,10 +38,7 @@ a img
 #editbar 
 {
   background: #f7f7f7;
-  background: -moz-linear-gradient(#f7f7f7, #f1f1f1 80%);
-  background: -ms-linear-gradient(#f7f7f7, #f1f1f1 80%);
-  background: -o-linear-gradient(#f7f7f7, #f1f1f1 80%);
-  background: -webkit-linear-gradient(#f7f7f7, #f1f1f1 80%);
+  background: linear-gradient(#f7f7f7, #f1f1f1 80%);
   border-bottom: 1px solid #ccc;
   height: 32px;
   overflow: hidden;
@@ -53,10 +49,7 @@ a img
 #editbar ul li 
 {
   background: #fff;
-  background: -moz-linear-gradient(#fff, #f0f0f0);
-  background: -ms-linear-gradient(#fff, #f0f0f0);
-  background: -o-linear-gradient(#fff, #f0f0f0);
-  background: -webkit-linear-gradient(#fff, #f0f0f0);
+  background: linear-gradient(#fff, #f0f0f0);
   border: 1px solid #ccc;
   border-radius: 4px;
   cursor: pointer;
@@ -86,10 +79,7 @@ a img
 
 #editbar ul li:active {
   background: #eee;
-  background: -moz-linear-gradient(#ddd, #fff);
-  background: -ms-linear-gradient(#ddd, #fff);
-  background: -o-linear-gradient(#ddd, #fff);
-  background: -webkit-linear-gradient(#ddd, #fff);
+  background: linear-gradient(#ddd, #fff);
 }
 
 #editbar ul li.separator
@@ -190,7 +180,6 @@ a#backtoprosite { padding-left: 20px; left: 6px;
 #alertbar {
   margin-top: 6px;
   opacity: 0;
-  filter: alpha(opacity = 0); /* IE */
   display: none;
   position:absolute;
   left:0;
@@ -384,10 +373,7 @@ a#hidetopmsg { position: absolute; right: 5px; bottom: 5px; }
 
 #mycolorpickersave, #mycolorpickercancel {
   background: #fff;
-  background: -moz-linear-gradient(#fff, #ccc);
-  background: -ms-linear-gradient(#fff, #ccc);
-  background: -o-linear-gradient(#fff, #ccc);
-  background: -webkit-linear-gradient(#fff, #ccc);
+  background: linear-gradient(#fff, #ccc);
   border: 1px solid #ccc;
   border-radius: 4px;
   font-size:12px; 
@@ -725,14 +711,7 @@ a#topbarmaximize {
  text-decoration: none;
  padding: 50pt;
  font-size: 20pt;
- -moz-border-radius-topleft: 3pt;
- -moz-border-radius-topright: 3pt;
- -moz-border-radius-bottomleft: 3pt;
- -moz-border-radius-bottomright: 3pt;
- -webkit-border-top-left-radius: 3pt;
- -webkit-border-top-right-radius: 3pt;
- -webkit-border-bottom-left-radius: 3pt;
- -webkit-border-bottom-right-radius: 3pt;
+ border-radius: 3pt;
 }
 
 .modaldialog .bigbutton {
@@ -953,7 +932,7 @@ position: relative;
 }
 
 .impexpbutton{
-  background-image: -moz-linear-gradient(center top , #EEEEEE, white 20%, white 20%);
+  background-image: linear-gradient(center top , #EEEEEE, white 20%, white 20%);
   padding:3px;
 }
 
@@ -1021,7 +1000,6 @@ color: white;
 background-color: rgb(0,0,0);
 background-color: rgba(0,0,0,0.7);
 padding: 10px;
--moz-border-radius: 6px;
 border-radius: 6px;
 opacity:.8;
 }
@@ -1118,14 +1096,12 @@ width:33px !important;
 #embedreadonlyqr {
   box-shadow: 0 0 10px #000;
   border-radius: 3px;
-  -webkit-transition: all .2s ease-in-out;
-  -moz-transition: all .2s ease-in-out;
+  transition: all .2s ease-in-out;
 }
 
 #embedreadonlyqr:hover {
   cursor: none;
-  -moz-transform: scale(1.5);
-  -webkit-transform: scale(1.5);
+  transform: scale(1.5);
 }
 
 @media screen and (max-width: 960px) {
@@ -1166,10 +1142,7 @@ width:33px !important;
   }
   #editbar ul#menu_right  {
     background: #f7f7f7;
-    background: -moz-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -ms-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -o-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -webkit-linear-gradient(#f7f7f7, #f1f1f1 80%);
+    background: linear-gradient(#f7f7f7, #f1f1f1 80%);
     width: 100%;
     overflow: hidden;
     height: 32px;
@@ -1193,10 +1166,7 @@ width:33px !important;
     border-right: none;
     border-radius: 0;
     background: #f7f7f7;
-    background: -moz-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -ms-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -o-linear-gradient(#f7f7f7, #f1f1f1 80%);
-    background: -webkit-linear-gradient(#f7f7f7, #f1f1f1 80%);
+    background: linear-gradient(#f7f7f7, #f1f1f1 80%);
     border: 0;
   }
   #chatbox {
@@ -1237,8 +1207,7 @@ label {
  border-radius: 6px;
  background: #222;
  background: rgba(0,0,0,.7);
- background: -webkit-linear-gradient(rgba(0,0,0,.6), rgba(0,0,0,.7) 35px, rgba(0,0,0,.6));
- background: -moz-linear-gradient(rgba(0,0,0,.6), rgba(0,0,0,.7) 35px, rgba(0,0,0,.6));
+ background: linear-gradient(rgba(0,0,0,.6), rgba(0,0,0,.7) 35px, rgba(0,0,0,.6));
  box-shadow: 0 0 8px #888;
  color: #fff;
 }
@@ -1247,7 +1216,6 @@ label {
  width: 100%;
  padding: 5px;
  box-sizing: border-box;
- -moz-box-sizing: border-box;
  display:block;
  margin-top: 10px;
 }
@@ -1292,8 +1260,5 @@ label {
 
 .selected {
  background: #eee !important;
- background: -webkit-linear-gradient(#EEE, #F0F0F0) !important;
- background: -moz-linear-gradient(#EEE, #F0F0F0) !important;
- background: -ms-linear-gradient(#EEE, #F0F0F0) !important;
- background: -o-linear-gradient(#EEE, #F0F0F0) !important;
+ background: linear-gradient(#EEE, #F0F0F0) !important;
 }
diff --git a/static/js/pad.js b/static/js/pad.js
index 47b1635b..c7a740cb 100644
--- a/static/js/pad.js
+++ b/static/js/pad.js
@@ -31,6 +31,7 @@ require('/farbtastic');
 require('/excanvas');
 JSON = require('/json2');
 require('/undo-xpopup');
+require('prefixfree');
 
 var chat = require('/chat').chat;
 var getCollabClient = require('/collab_client').getCollabClient;
diff --git a/static/js/prefixfree.js b/static/js/prefixfree.js
new file mode 100644
index 00000000..1b0d5246
--- /dev/null
+++ b/static/js/prefixfree.js
@@ -0,0 +1,419 @@
+/**
+ * StyleFix 1.0.1
+ * @author Lea Verou
+ * MIT license
+ */
+
+(function(){
+
+if(!window.addEventListener) {
+	return;
+}
+
+var self = window.StyleFix = {
+	link: function(link) {
+		try {
+			// Ignore stylesheets with data-noprefix attribute as well as alternate stylesheets
+			if(link.rel !== 'stylesheet' || !link.sheet.cssRules || link.hasAttribute('data-noprefix')) {
+				return;
+			}
+		}
+		catch(e) {
+			return;
+		}
+
+		var url = link.href || link.getAttribute('data-href'),
+		    base = url.replace(/[^\/]+$/, ''),
+		    parent = link.parentNode,
+		    xhr = new XMLHttpRequest();
+		
+		xhr.open('GET', url);
+
+		xhr.onreadystatechange = function() {
+			if(xhr.readyState === 4) {
+				var css = xhr.responseText;
+				
+				if(css && link.parentNode) {
+					css = self.fix(css, true, link);
+					
+					// Convert relative URLs to absolute, if needed
+					if(base) {
+						css = css.replace(/url\((?:'|")?(.+?)(?:'|")?\)/gi, function($0, url) {
+							if(!/^([a-z]{3,10}:|\/|#)/i.test(url)) { // If url not absolute & not a hash
+								// May contain sequences like /../ and /./ but those DO work
+								return 'url("' + base + url + '")';
+							}
+							
+							return $0;						
+						});
+						
+						// behavior URLs shoudn’t be converted (Issue #19)
+						css = css.replace(RegExp('\\b(behavior:\\s*?url\\(\'?"?)' + base, 'gi'), '$1');
+					}
+					
+					var style = document.createElement('style');
+					style.textContent = css;
+					style.media = link.media;
+					style.disabled = link.disabled;
+					style.setAttribute('data-href', link.getAttribute('href'));
+					
+					parent.insertBefore(style, link);
+					parent.removeChild(link);
+				}
+			}
+		};
+		
+		xhr.send(null);
+		
+		link.setAttribute('data-inprogress', '');
+	},
+
+	styleElement: function(style) {
+		var disabled = style.disabled;
+		
+		style.textContent = self.fix(style.textContent, true, style);
+		
+		style.disabled = disabled;
+	},
+
+	styleAttribute: function(element) {
+		var css = element.getAttribute('style');
+		
+		css = self.fix(css, false, element);
+		
+		element.setAttribute('style', css);
+	},
+	
+	process: function() {
+		// Linked stylesheets
+		$('link[rel="stylesheet"]:not([data-inprogress])').forEach(StyleFix.link);
+		
+		// Inline stylesheets
+		$('style').forEach(StyleFix.styleElement);
+		
+		// Inline styles
+		$('[style]').forEach(StyleFix.styleAttribute);
+	},
+	
+	register: function(fixer, index) {
+		(self.fixers = self.fixers || [])
+			.splice(index === undefined? self.fixers.length : index, 0, fixer);
+	},
+	
+	fix: function(css, raw) {
+		for(var i=0; i<self.fixers.length; i++) {
+			css = self.fixers[i](css, raw) || css;
+		}
+		
+		return css;
+	},
+	
+	camelCase: function(str) {
+		return str.replace(/-([a-z])/g, function($0, $1) { return $1.toUpperCase(); }).replace('-','');
+	},
+	
+	deCamelCase: function(str) {
+		return str.replace(/[A-Z]/g, function($0) { return '-' + $0.toLowerCase() });
+	}
+};
+
+/**************************************
+ * Process styles
+ **************************************/
+(function(){
+	setTimeout(function(){
+		$('link[rel="stylesheet"]').forEach(StyleFix.link);
+	}, 10);
+	
+	document.addEventListener('DOMContentLoaded', StyleFix.process, false);
+})();
+
+function $(expr, con) {
+	return [].slice.call((con || document).querySelectorAll(expr));
+}
+
+})();
+
+/**
+ * PrefixFree 1.0.4
+ * @author Lea Verou
+ * MIT license
+ */
+(function(root, undefined){
+
+if(!window.StyleFix || !window.getComputedStyle) {
+	return;
+}
+
+var self = window.PrefixFree = {
+	prefixCSS: function(css, raw) {
+		var prefix = self.prefix;
+		
+		function fix(what, before, after, replacement) {
+			what = self[what];
+			
+			if(what.length) {
+				var regex = RegExp(before + '(' + what.join('|') + ')' + after, 'gi');
+
+				css = css.replace(regex, replacement);
+			}
+		}
+		
+		fix('functions', '(\\s|:|,)', '\\s*\\(', '$1' + prefix + '$2(');
+		fix('keywords', '(\\s|:)', '(\\s|;|\\}|$)', '$1' + prefix + '$2$3');
+		fix('properties', '(^|\\{|\\s|;)', '\\s*:', '$1' + prefix + '$2:');
+		
+		// Prefix properties *inside* values (issue #8)
+		if (self.properties.length) {
+			var regex = RegExp('\\b(' + self.properties.join('|') + ')(?!:)', 'gi');
+			
+			fix('valueProperties', '\\b', ':(.+?);', function($0) {
+				return $0.replace(regex, prefix + "$1")
+			});
+		}
+		
+		if(raw) {
+			fix('selectors', '', '\\b', self.prefixSelector);
+			fix('atrules', '@', '\\b', '@' + prefix + '$1');
+		}
+		
+		// Fix double prefixing
+		css = css.replace(RegExp('-' + prefix, 'g'), '-');
+		
+		return css;
+	},
+	
+	// Warning: prefixXXX functions prefix no matter what, even if the XXX is supported prefix-less
+	prefixSelector: function(selector) {
+		return selector.replace(/^:{1,2}/, function($0) { return $0 + self.prefix })
+	},
+	
+	prefixProperty: function(property, camelCase) {
+		var prefixed = self.prefix + property;
+		
+		return camelCase? StyleFix.camelCase(prefixed) : prefixed;
+	}
+};
+
+/**************************************
+ * Properties
+ **************************************/
+(function() {
+	var prefixes = {},
+		properties = [],
+		shorthands = {},
+		style = getComputedStyle(document.documentElement, null),
+		dummy = document.createElement('div').style;
+	
+	// Why are we doing this instead of iterating over properties in a .style object? Cause Webkit won't iterate over those.
+	var iterate = function(property) {
+		if(property.charAt(0) === '-') {
+			properties.push(property);
+			
+			var parts = property.split('-'),
+				prefix = parts[1];
+				
+			// Count prefix uses
+			prefixes[prefix] = ++prefixes[prefix] || 1;
+			
+			// This helps determining shorthands
+			while(parts.length > 3) {
+				parts.pop();
+				
+				var shorthand = parts.join('-');
+
+				if(supported(shorthand) && properties.indexOf(shorthand) === -1) {
+					properties.push(shorthand);
+				}
+			}
+		}
+	},
+	supported = function(property) {
+		return StyleFix.camelCase(property) in dummy;
+	}
+	
+	// Some browsers have numerical indices for the properties, some don't
+	if(style.length > 0) {
+		for(var i=0; i<style.length; i++) {
+			iterate(style[i])
+		}
+	}
+	else {
+		for(var property in style) {
+			iterate(StyleFix.deCamelCase(property));
+		}
+	}
+
+	// Find most frequently used prefix
+	var highest = {uses:0};
+	for(var prefix in prefixes) {
+		var uses = prefixes[prefix];
+
+		if(highest.uses < uses) {
+			highest = {prefix: prefix, uses: uses};
+		}
+	}
+	
+	self.prefix = '-' + highest.prefix + '-';
+	self.Prefix = StyleFix.camelCase(self.prefix);
+	
+	self.properties = [];
+
+	// Get properties ONLY supported with a prefix
+	for(var i=0; i<properties.length; i++) {
+		var property = properties[i];
+		
+		if(property.indexOf(self.prefix) === 0) { // we might have multiple prefixes, like Opera
+			var unprefixed = property.slice(self.prefix.length);
+			
+			if(!supported(unprefixed)) {
+				self.properties.push(unprefixed);
+			}
+		}
+	}
+	
+	// IE fix
+	if(self.Prefix == 'Ms' 
+	  && !('transform' in dummy) 
+	  && !('MsTransform' in dummy) 
+	  && ('msTransform' in dummy)) {
+		self.properties.push('transform', 'transform-origin');	
+	}
+	
+	self.properties.sort();
+})();
+
+/**************************************
+ * Values
+ **************************************/
+(function() {
+// Values that might need prefixing
+var functions = {
+	'linear-gradient': {
+		property: 'backgroundImage',
+		params: 'red, teal'
+	},
+	'calc': {
+		property: 'width',
+		params: '1px + 5%'
+	},
+	'element': {
+		property: 'backgroundImage',
+		params: '#foo'
+	}
+};
+
+
+functions['repeating-linear-gradient'] =
+functions['repeating-radial-gradient'] =
+functions['radial-gradient'] =
+functions['linear-gradient'];
+
+var keywords = {
+	'initial': 'color',
+	'zoom-in': 'cursor',
+	'zoom-out': 'cursor',
+	'box': 'display',
+	'flexbox': 'display',
+	'inline-flexbox': 'display'
+};
+
+self.functions = [];
+self.keywords = [];
+
+var style = document.createElement('div').style;
+
+function supported(value, property) {
+	style[property] = '';
+	style[property] = value;
+
+	return !!style[property];
+}
+
+for (var func in functions) {
+	var test = functions[func],
+		property = test.property,
+		value = func + '(' + test.params + ')';
+	
+	if (!supported(value, property)
+	  && supported(self.prefix + value, property)) {
+		// It's supported, but with a prefix
+		self.functions.push(func);
+	}
+}
+
+for (var keyword in keywords) {
+	var property = keywords[keyword];
+
+	if (!supported(keyword, property)
+	  && supported(self.prefix + keyword, property)) {
+		// It's supported, but with a prefix
+		self.keywords.push(keyword);
+	}
+}
+
+})();
+
+/**************************************
+ * Selectors and @-rules
+ **************************************/
+(function() {
+
+var 
+selectors = {
+	':read-only': null,
+	':read-write': null,
+	':any-link': null,
+	'::selection': null
+},
+
+atrules = {
+	'keyframes': 'name',
+	'viewport': null,
+	'document': 'regexp(".")'
+};
+
+self.selectors = [];
+self.atrules = [];
+
+var style = root.appendChild(document.createElement('style'));
+
+function supported(selector) {
+	style.textContent = selector + '{}';  // Safari 4 has issues with style.innerHTML
+	
+	return !!style.sheet.cssRules.length;
+}
+
+for(var selector in selectors) {
+	var test = selector + (selectors[selector]? '(' + selectors[selector] + ')' : '');
+		
+	if(!supported(test) && supported(self.prefixSelector(test))) {
+		self.selectors.push(selector);
+	}
+}
+
+for(var atrule in atrules) {
+	var test = atrule + ' ' + (atrules[atrule] || '');
+	
+	if(!supported('@' + test) && supported('@' + self.prefix + test)) {
+		self.atrules.push(atrule);
+	}
+}
+
+root.removeChild(style);
+
+})();
+
+// Properties that accept properties as their value
+self.valueProperties = [
+	'transition',
+	'transition-property'
+]
+
+// Add class for current prefix
+root.className += ' ' + self.prefix;
+
+StyleFix.register(self.prefixCSS);
+
+
+})(document.documentElement);