{"id":7047167,"date":"2026-08-25T09:44:20","date_gmt":"2026-08-25T09:44:20","guid":{"rendered":"https:\/\/peraltafinancing.com\/uncategorized\/inaudible-sounds-used-to-fingerprint-browsers-catch-aliexpress-red-handed\/"},"modified":"2026-08-25T09:44:20","modified_gmt":"2026-08-25T09:44:20","slug":"inaudible-sounds-used-to-fingerprint-browsers-catch-aliexpress-red-handed","status":"publish","type":"post","link":"https:\/\/fivemor.com\/?p=7047167","title":{"rendered":"Inaudible sounds used to fingerprint browsers catch AliExpress red-handed"},"content":{"rendered":"<p> <br \/>\n<br \/><img decoding=\"async\" src=\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2022\/03\/browser-fingerprint-1000x648.jpeg\" \/><\/p>\n<div>\n<p>Variability in different math libraries, which are used when audio is produced through browsers, were once high enough to provide a massively large number of uniquely different signatures when combined with different CPUs and other system differences. After the audio soundprinting technique became well known, Firefox implemented a fix, starting in <a href=\"https:\/\/www.firefox.com\/en-US\/firefox\/118.0\/releasenotes\/\">version 118<\/a> released in 2023. Beginning <a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1358149\">then<\/a>, the browser used its own unique math libraries, rather than relying on ones that shipped with the OS it ran on. Tom Ritter, a Firefox developer who has also volunteered for the Tor Project, <a href=\"https:\/\/ritter.vg\/blog-webaudio_alibaba.html\">said<\/a> the move to constant libraries reduced the entropy enough to stop the technique from working.<\/p>\n<p>The technique is ineffective in Chrome because it, too, ships with its own libraries, a Google spokesperson said. Safari users are likely safe for the same reason, although Apple didn\u2019t immediately confirm that.<\/p>\n<h2>An artifact from years past<\/h2>\n<p>AliExpress\u2019 use of an obsolete fingerprinting method raises the question: Why is it bothering to use it? The likely answer has to do with the more than a dozen other fingerprinting methods the online retailer is using. Callaghan said the other techniques included:<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">canvas rendering and toDataURL()<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">WebGL renderer information, extensions, and shader precision<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">audio oscillator and analyzer output<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">screen and viewport dimensions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">device pixel ratio<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">hardware concurrency and device memory<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">installed browser plugins<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">supported audio and video formats<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">WebRTC behavior<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">browser performance timing<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">mouse, touch, focus, and scroll events<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">device motion and orientation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">properties commonly associated with browser automation<\/span><\/li>\n<\/ul>\n<p>It\u2019s likely the web audio trick is left over from years earlier and no one noticed it until now.<\/p>\n<p>It\u2019s comforting to know that browser makers have taken precautions. At the same time, it\u2019s not yet clear how effective the rest of the metrics AliExpress is using are. Less reassuring still: it\u2019s almost a certainty that thousands of sites are employing similar tracking. Browser developers are in a dynamic race with site publishers, who are constantly looking for new ways to break the latest protections.<\/p>\n<\/p><\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Variability in different math libraries, which are used when audio is produced through browsers, were once high enough to provide a massively large number of uniquely different signatures when combined with different CPUs and other system differences. After the audio soundprinting technique became well known, Firefox implemented a fix, starting in version 118 released in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7047168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[209754,108292,209755,209756,166087,119305,101235],"tags":[209758,12736,2468,28128,209757,209759,5861],"dealstore":[],"offerexpiration":[],"class_list":["post-7047167","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aliexpress","category-biz-it","category-browser-fingerprinting","category-chromium","category-firefox","category-safari","category-security","tag-aliexpress","tag-browsers","tag-catch","tag-fingerprint","tag-inaudible","tag-redhanded","tag-sounds"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Inaudible sounds used to fingerprint browsers catch AliExpress red-handed - Som2ny Network<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fivemor.com\/?p=7047167\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inaudible sounds used to fingerprint browsers catch AliExpress red-handed - Som2ny Network\" \/>\n<meta property=\"og:description\" content=\"Variability in different math libraries, which are used when audio is produced through browsers, were once high enough to provide a massively large number of uniquely different signatures when combined with different CPUs and other system differences. After the audio soundprinting technique became well known, Firefox implemented a fix, starting in version 118 released in [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fivemor.com\/?p=7047167\" \/>\n<meta property=\"og:site_name\" content=\"Som2ny Network\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-25T09:44:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/fivemor.com\/wp-content\/uploads\/2026\/08\/browser-fingerprint-1000x648.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"648\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fivemor.com\/?p=7047167#article\",\"isPartOf\":{\"@id\":\"https:\/\/fivemor.com\/?p=7047167\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/fivemor.com\/#\/schema\/person\/b85e3c3dc0e1daea076524dc8810c371\"},\"headline\":\"Inaudible sounds used to fingerprint browsers catch AliExpress red-handed\",\"datePublished\":\"2026-08-25T09:44:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fivemor.com\/?p=7047167\"},\"wordCount\":345,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fivemor.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/fivemor.com\/?p=7047167#primaryimage\"},\"thumbnailUrl\":\"https:\/\/fivemor.com\/wp-content\/uploads\/2026\/08\/browser-fingerprint-1000x648.jpeg\",\"keywords\":[\"AliExpress\",\"Browsers\",\"Catch\",\"Fingerprint\",\"Inaudible\",\"redhanded\",\"Sounds\"],\"articleSection\":[\"AliExpress\",\"Biz &amp; 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