The Tor Browser / file revision

 var so = [];

 function U(unusedV)

 {

   for (var i = 0; i < so.length; ++i)

     return false;

   so.push(0);

 }

 function C(v)

 {

   if (typeof v == "object" || typeof v == "function") {

     for (var i = 0; i < 10; ++i) {}

     U(v);

   }

 }

 function exploreProperties(obj)

 {

   var props = [];

   for (var o = obj; o; o = Object.getPrototypeOf(o)) {

     props = props.concat(Object.getOwnPropertyNames(o));

   }

   for (var i = 0; i < props.length; ++i) {

     var p = props[i];

     try { 

       var v = obj[p];

       C(v);

     } catch(e) { }

   }

 }

 function boom()

 {

   var a = [];

   var b = function(){};

   var c = [{}];

   exploreProperties(a);

   exploreProperties(b);

   exploreProperties(c);

   exploreProperties(c);

 }

 boom();