MutationObserver to buttify dynamic DOM updates

Source/content_script.js

@@ -41,14 +41,14 @@ function handleText(textNode) {
     return m + "y " + b + "utt";
   });
 
-  // Deal with private clouds
+  // Deal with butts
   v = v.replace(/\b(P|p)rivate (C|c)loud/g, function(match, p1, p2, offset, string) {
     // c - 1 = b
     b = String.fromCharCode(p2.charCodeAt(0) - 1);
     return b + "utt";
   });
   // Get the corner cases
-  if(v.match(/cloud/i)) {
+  if(v.match(/butt/i)) {
     // If we're not talking about weather
     if(v.match(/PaaS|SaaS|IaaS|computing|data|storage|cluster|distributed|server|hosting|provider|grid|enterprise|provision|apps|hardware|software|/i)) {
       v = v.replace(/(C|c)loud/gi, function(match, p1, offset, string) {
@@ -62,3 +62,16 @@ function handleText(textNode) {
 }
 
 
+MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
+var observer = new MutationObserver(function(mutations, observer) {
+    // fired when a mutation occurs
+    mutations.forEach(function(mutation) { walk(mutation.target); });
+});
+
+// Begin observing document.body for changes that need buttifying
+observer.observe(document.body, {
+  subtree: true,
+  attributes: false,
+  characterData: true,
+  childList: true
+});