Bug 923010.  When rethrowing exceptions from JS-implemented components to content script, make sure to give them a useful filename and line number, pointing to the content script location that triggered the exception.  r=peterv
Bug 907077: Change for-of to conform to latest ES6 specification. r=jwalden
Bug 907077: Adapt addon SDK custom iterators to work with new for-of behavior r=rFobic