code: function createFallbacks(options) {
    var bootstrapSrc = options.bootstrapSrc;
  
    if (options.useFallbacks && options.verbose) {
      console.log("Creating fallbacks if they are necessary..");
    }
  
    return getManifest({
      addonDir: options.addonDir
    }).then(function(manifest) {
      return when.all([
        options.needsInstallRDF ? when.resolve(
          RDF.createRDF(manifest, options.needsBootstrapJS)) : when.resolve(),
        options.needsBootstrapJS ? when.resolve(
          fs.readFile(bootstrapSrc)) : when.resolve(),
      ]).then(function(fallbacks) {
        if (fallbacks) {
          return {
            installRDF: fallbacks[0],
            bootstrapJS: fallbacks[1]
          };
        }
      });
    });
  }
docs: Creates bootstrap.js/install.rdf