The Tor Browser / file revision

 // Ported from dom/src/json/test/unit/test_encode_primitives.js

 // sanity

 var x = JSON.stringify({});

 assertEq(x, "{}");

 // booleans and null

 x = JSON.stringify(true);

 assertEq(x, "true");

 x = JSON.stringify(false);

 assertEq(x, "false");

 x = JSON.stringify(new Boolean(false));

 assertEq(x, "false");

 x = JSON.stringify(null);

 assertEq(x, "null");

 x = JSON.stringify(1234);

 assertEq(x, "1234");

 x = JSON.stringify(new Number(1234));

 assertEq(x, "1234");

 x = JSON.stringify("asdf");

 assertEq(x, '"asdf"');

 x = JSON.stringify(new String("asdf"));

 assertEq(x, '"asdf"');

 assertEq(JSON.stringify(undefined), undefined);

 assertEq(JSON.stringify(function(){}), undefined);

 assertEq(JSON.stringify(JSON.stringify), undefined);

 /******************************************************************************/

 if (typeof reportCompare === "function")

   reportCompare(true, true);

 print("Tests complete");