This code helps with finding blobs that weren't cleared with revokeObjectURL causing memory leak.

blob-related-memory-leaks-sensor.js

(function() {
  const URLCACHE = window.URLCACHE = {};
  const createObjectURL = URL.createObjectURL.bind(URL);

  URL.createObjectURL = (...args) => {
    const result = createObjectURL(...args);
    URLCACHE[result] = true;
    return result;
  };

  const revokeObjectURL = URL.revokeObjectURL.bind(URL);

  URL.revokeObjectURL = (...args) => {
    delete URLCACHE[args[0]];

    return revokeObjectURL(...args);
  };
})()