PDFs from lumileds.com do not load with PDF.js. Part of the background loads, then only the spinner continues while using 100% CPU. 

An example pdf is http://www.lumileds.com/uploads/17/DS61-pdf 

This behaviour occurs with both the release version of pdf.js in firefox 41.0.2 and the latest .xpi downloaded from this github page.

return decodeURIComponent(escape(str));
}
function utf8StringToString(str) {
  return unescape(encodeURIComponent(str));
}
function isBool(v) {
  return typeof v === "boolean";
}
function isNum(v) {
  return typeof v === "number";
}
function isString(v) {
  return typeof v === "string";
}
function isArrayBuffer(v) {
  return typeof v === "object" && v !== null && v.byteLength !== undefined;
}
function isArrayEqual(arr1, arr2) {
  if (arr1.length !== arr2.length) {
    return false;
  }
  for (let i = 0, ii = arr1.length; i < ii; i++) {
    if (arr1[i] !== arr2[i]) {
      return false;
    }
  }
  return true;
}
function getModificationDate(date = new Date()) {