[dredmorbius]

So, say, a browser plugin which renamed "main" elements to, oh, say, "notmain", would have the effect of killing autoplay.

Though for Flash that's already possible. It's HTML5 that's bugging the shit out of me now.

[icebraining]

For Chrome: https://chrome.google.com/webstore/detail/disable-html5-auto...

For Firefox, I think you can just set media.autoplay.enabled = false in about:config.

[dredmorbius]

Thanks, I'd not seen an HTML5 video blocker previously.