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rasz on April 17, 2021 | parent | context | favorite | on: Are top websites using WebGL for fingerprinting?

is that Firefox? in Chrome I get

    gl.getParameter.toString() = () => 'function getParameter() { [native code] }'
    gl.getParameter.toString()
    "function getParameter() { [native code] }"
    gl.getParameter.toString().toString()
    "function getParameter() { [native code] }"
    gl.getParameter.toString().toString().toString()
    "function getParameter() { [native code] }"

iframes, worker, sharedworker, serviceWorker are all covered. Good luck timing the difference.

deathanatos on April 17, 2021 [–]

You're running

  gl.getParameter.toString().toString()

what the comment you're replying to is trying to tell you to run is:

  gl.getParameter.toString.toString()

Call toString on the toString fuction, not on its result.

rasz on April 17, 2021 | [–]

Good point. Rewriting according to https://adtechmadness.wordpress.com/2019/03/23/javascript-ta... now

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