gistfile1.txt

// paste the following into a new bookmark called CQ5 Preview
javascript:(function(){
 function updateQueryStringParameter(uri, key, value) {
   var re = new RegExp("([?|&])" + key + "=.*?(&|$)", "i");
   separator = uri.indexOf('?') !== -1 ? "&" : "?";
   if (uri.match(re)) {
     return uri.replace(re, '$1' + key + "=" + value + '$2');
   }
   else {
     return uri + separator + key + "=" + value;
   }
 }
 var url = updateQueryStringParameter(document.location.href, "wcmmode", "disabled");
 document.location.href = url.replace(/cf#\//, "");
})();