pdfjs-dist/extensions/firefox/content/PdfJs-stub.jsm

// Don't remove this file. FF15+ expects PdfJs module to be present at resource://pdf.js/PdfJs.jsm
// See https://mxr.mozilla.org/mozilla-central/source/browser/components/nsBrowserGlue.js
var EXPORTED_SYMBOLS = ["PdfJs"];

let PdfJs = {
  init: function PdfJs_init() {}
};