Fix ##4522: Removes canvas rule on fingerprint protection #4523

brave · Jan 4, 2022 · 464a092 · 464a092
1 parent f699f2a
commit 464a092
Showing 1 changed file with 0 additions and 25 deletions.
diff --git a/Client/Frontend/UserContent/UserScripts/FingerprintingProtection.js b/Client/Frontend/UserContent/UserScripts/FingerprintingProtection.js
@@ -10,31 +10,11 @@ if (webkit.messageHandlers.$<handler>) {
             }
         }
 
-        function installIFrameMethodTrap(obj, method) {
-            let orig = obj[method];
-            obj[method] = function () {
-                var last = arguments[arguments.length - 1]
-                if (last && last.toLowerCase() === 'canvas') {
-                    // Prevent fingerprinting using contentDocument.createElement('canvas'),
-                    // which evades trapInstanceMethod when the iframe is sandboxed
-                    sendMessage({ obj: `${obj}`, method: method })
-                } else {
-                    // Otherwise apply the original method
-                    return orig.apply(this, arguments)
-                }
-            };
-            return orig;
-        }
-
         let hooks = [
             {
                 obj: window.CanvasRenderingContext2D.prototype,
                 methods: ['getImageData', 'getLineDash', 'measureText']
             },
-            {
-                obj: window.HTMLCanvasElement.prototype,
-                methods: ['toDataURL', 'toBlob']
-            },
             {
                 obj: window.WebGLRenderingContext.prototype,
                 methods: ['getSupportedExtensions', 'getParameter', 'getContextAttributes', 'getShaderPrecisionFormat', 'getExtension']
@@ -58,10 +38,5 @@ if (webkit.messageHandlers.$<handler>) {
             });
         });
 
-        // Install iframe Document Hooks
-        if (window.frameElement) {
-            installIFrameMethodTrap(document, 'createElement');
-            installIFrameMethodTrap(document, 'createElementNS');
-        }
     })();
 }