diff --git a/lib/metamorph.js b/lib/metamorph.js
old mode 100644
new mode 100755
index c46673e..ff42ebd
--- a/lib/metamorph.js
+++ b/lib/metamorph.js
@@ -7,6 +7,14 @@
 
   var K = function(){},
       guid = 0,
+      // At initialization, create a prefix associated with this Metamorph instance.
+      // This is useful if you have multiple metamorphs in a page, which happens if you
+      // have a Chrome extension with a content script written in Ember, and navigate to
+      // a page written in Ember.
+      ts = (new Date()).valueOf().toString();
+      rand = ((Math.random() * 0x10000)|0).toString();
+      prefix = ts + rand;
+
       document = window.document,
 
       // Feature-detect the W3C range API, the extended check is for IE9 which only partially supports ranges
@@ -37,7 +45,7 @@
     }
 
     self.innerHTML = html;
-    var myGuid = 'metamorph-'+(guid++);
+    var myGuid = 'metamorph-' + prefix + '-' + (guid++);
     self.start = myGuid + '-start';
     self.end = myGuid + '-end';