Latest Version Private Browsing Mode Hello. 'Autoplay->Block Video and Audio' selected. 2 websites listed, which I did not place there, 'Allow Audio and Video' selected: 1. about:welcome 2. aboutwelcomeprivate welcome 'Removing' them causes them to be automatically 're-appear.' Suggestion: about:config, .isolateBy.privateBrowsing,' and change 'True' to False. Changing the 'above value' does not remove the 2 'allowed' websites nor does it stop A and V from playing automatically. Not possible to Block all Video and Audio Automatically 'or' am I missing an 'obvious' solution?