Personally, I would dearly love to have a per-tab switch in the toolbar to turn off all javascript processing for non-current tabs. If I want to specifically grant some of them background processing ability, fine, but when I have 100 browser tabs open across 10 windows (sigh, an all-too-often occurrence), 97% of them are there simply to remember exactly where I was on each given webpage, and I don't need/want them doing any processing, I just want them to sit there in stasis, waiting for the eventual return of my attention.Thank you! All browsers should implement a flag that stop ALL autoplay audio/video without explicit input from the user. No javascript and HTML5 workarounds. I'm fine with it impacting my browsing experience if I never have to deal with another autoplay video again.