Thu, 15 Jan 2015 15:59:08 +0100
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 load(libdir + "asserts.js");
3 /*
4 * Throw a TypeError if the current descriptor is non-configurable and the trap
5 * returns a configurable descriptor
6 */
7 var target = {};
8 Object.defineProperty(target, 'foo', {
9 configurable: false
10 });
11 assertThrowsInstanceOf(function () {
12 Object.getOwnPropertyDescriptor(Proxy(target, {
13 getOwnPropertyDescriptor: function (target, name) {
14 return {
15 configurable: true
16 };
17 }
18 }), 'foo');
19 }, TypeError);