this is (in my experiance) usually caused by an extension (a privacy related one). turn off your extensions (one by one) to see who the turd is. or go into the settings of the extension (ex. ghostery) and allow the blocked content that is causing this. i used to have to turn ghostery off to view some things, changing the settings wouldn't even help (was a bug or something, they probably fixed that by now - it was years ago).