I opened MacRumors.com just now and a video about the new iSteve movie began to play. How do I prevent this from happening? I am using Safari 6.0.3 on Mountain Lion 10.8.3. I tried it with all extensions turned off and it still happened. I do not have Flash installed. (If I need Flash I open Google Chrome which has a Flash player embedded within it.) I've gone through all the all the Preference options and Menu options but cannot see what might be contributing to this behavior as I am certain it was not happening a day or two ago. I do have the Safari "Develop" menu turned on, but I have not selected any of the options. Any help appreciated. Thanks, Drew.