commit 950f9d89e069c6ed54d7e0af7f738690d047442f Author: Mike Perry <mikeperry-git@fscked.org> Date: Tue Dec 20 21:04:07 2011 -0800 Bug 4755: Spoof screen coords for DOM MouseEvents Helps reduce fingerprinting linkability: https://www.torproject.org/projects/torbrowser/design/#fingerprinting-linkab... --- src/chrome/content/jshooks4.js | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/src/chrome/content/jshooks4.js b/src/chrome/content/jshooks4.js index f5573ac..655a04d 100644 --- a/src/chrome/content/jshooks4.js +++ b/src/chrome/content/jshooks4.js @@ -28,6 +28,12 @@ window.__HookObjects = function() { Object.defineProperty(window.__proto__, "screenY", {get: function() { return 0;}, configurable: false}); + Object.defineProperty(MouseEvent.prototype, "screenX", + {get: function() { return this.clientX;}, + configurable: false}); + Object.defineProperty(MouseEvent.prototype, "screenY", + {get: function() { return this.clientY;}, + configurable: false}); // We can't define individual getters/setters for window.screen // for some reason. works in html but not in these hooks.. No idea why