Bug 820582: freezing metadata and metadata.permissions in bootstrap.j…

…s file now and no longer need to do this in the loader; freezing should only be done for add-on metadata

lib/toolkit/loader.js

@@ -415,14 +415,6 @@ const Loader = iced(function Loader(options) {
     sort(function(a, b) { return b.length - a.length }).
     map(function(path) { return [ path, paths[path] ] });
 
-  // if no metadata is defined, then create a blank object
-  // here so that it can still be frozen
-  if (!options.metadata)
-    options.metadata = {};
-
-  // freeze the metadata to prevent changes at runtime
-  Object.freeze(options.metadata);
-
   // Define pseudo modules.
   modules = override({
     '@loader/unload': destructor,