<!DOCTYPE html> <html> <head> <title>Test</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link href="testIcon.svg" type="image/png" rel="icon"> <link href="testIcon.svg" type="image/png" rel="shortcut icon"> <script> console.log(new Date(), "starting first fingerprint", window.name); function fingerPrint(){ "use strict";var canvas = document.createElement("canvas"); canvas.setAttribute("width", 220); canvas.setAttribute("height", 30); var fp_text = "BrowserLeaks,com <canvas> 10"; var ctx = canvas.getContext("2d"); ctx.textBaseline = "top"; ctx.font = "14px 'Arial'"; ctx.textBaseline = "alphabetic"; ctx.fillStyle = "#f60"; ctx.fillRect(125, 1, 62, 20); ctx.fillStyle = "#069"; ctx.fillText(fp_text, 2, 15); ctx.fillStyle = "rgba(102, 204, 0, 07)"; ctx.fillText(fp_text, 4, 17); return canvas.toDataURL(); } function hash(url){ var buffer = new TextEncoder("utf-8").encode(url); return crypto.subtle.digest("SHA-256", buffer).then(function(hash){ var chunks = []; (new Uint32Array(hash)).forEach(function(num){ chunks.push(num.toString(16)); }); return chunks.map(function(chunk){ return "0".repeat(8 - chunk.length) + chunk; }).join(""); }); } try { var firstFingerprint = fingerPrint(); } catch (e){ console.log(new Date(), e); var firstFingerprint = false; } </script> </head> <body> <script> if (firstFingerprint){ document.body.textContent = "context API not blocked"; window.setTimeout(function(){ console.log(new Date(), "starting second fingerprint", window.name); document.body.appendChild(document.createElement("br")); var secondFingerprint = fingerPrint(); if (firstFingerprint === secondFingerprint){ hash(firstFingerprint).then(function(hash){ document.body.appendChild(document.createTextNode("fingerprint consistent (" + hash + ") -> good!")); document.body.style.backgroundColor = "green"; }); } else { Promise.all([hash(firstFingerprint), hash(secondFingerprint)]).then(function(hashes){ document.body.appendChild(document.createTextNode("fingerprint not consistent (" + hashes[0] + " != " + hashes[1] + ") -> very bad! (potential fingerprint leak)")); document.body.style.backgroundColor = "red"; }); } }, 500); } else { document.body.textContent = "context API blocked"; document.body.style.backgroundColor = "orange"; } </script> </body></html>