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The bad thing about Flash video was that it required a third-party plugin to play the content. The good thing was I could select which content to play; using the click-to-play feature in Firefox and Chrome.

But now that HTML5 video is getting popular, I see a lot of ads popping into view again. They are not only a distraction, they hog resources on my computer and make the fans spin full speed.

Is there a way to disable HTML5 audio/video content by default, and enable it only selectively?

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“HTML5” is a buzzword. Please specify what you want to disable. –  kinokijuf Nov 7 '13 at 9:01

3 Answers 3

up vote 5 down vote accepted

In Firefox you can set media.autoplay.enabled to false in about:config though as of now this may not be sufficient for every case. An extension like NoScript (default settings) could be used to complement the missing functionality or even otherwise used by itself without the about:config setting. In NoScript it's also possible to extend the functionality to whitelisted sites (NoScript Options > Whitelist) via NoScript Options > Embeddings: Apply these restrictions ...

about:config Entries

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This works, thanks! I luckily use NoScript already. Still looking for a setting in Chrome. –  HRJ Nov 8 '13 at 3:10
No problem :) Regarding Chrome, this thread (though not related to Chrome settings) could be helpful. –  vWil Nov 8 '13 at 15:34

For Chrome/Chromium, there is HTTP Switchboard (available in Chrome store or github). There is a column in the matrix which can be selectively be turned on or off, which turn on/off HTML5 video/audio/SVG/fonts -- for whatever hostnames you wish.

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Link to Chrome Webstore: chrome.google.com/webstore/detail/http-switchboard/… –  joeytwiddle Aug 5 at 20:56

For Chrome I am satisfied with Stop HTML5 Video Autoplay
Does not prevent loading but good enough to prevent media from auto playing

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Extension deleted by author... –  user11153 Jun 15 at 11:55
I have emailed the author, he said it was removed by Google and now it has been restored –  Costin Gușă Jun 19 at 10:27

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