The Tor Browser / file revision

 function parsingNumbers() {

     var s1 = "123";

     var s1z = "123zzz";

     var s2 = "123.456";

     var s2z = "123.456zzz";

     var e1 = 123;

     var e2 = 123.456;

     var r1, r1z, r2, r2z;

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

         r1 = parseInt(s1);

         r1z = parseInt(s1z);

         r2 = parseFloat(s2);

         r2z = parseFloat(s2z);

     }

     if (r1 == e1 && r1z == e1 && r2 == e2 && r2z == e2)

         return "ok";

     return "fail";

 }

 assertEq(parsingNumbers(), "ok");