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Firefox 63 (macOS) lets YouTube videos start automatically in spite of "media.autoplay.enabled" being set to "false." Can that be fixed, please?

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Firefox 63 (macOS) lets YouTube videos start automatically in spite of "media.autoplay.enabled" being set to "false."

Can that be fixed, please?

PS (on 10/25/2018): I posted this question by mistake twice and the other question has been answered. To stop autoplay the setting "media.autoplay.default" has to be changed to 1.

Modified by resucami2

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Hi resucami2,please see what our ace support volunteer, Philipp wrote:

" hi, in firefox 63 the autoplay preferences are reorganised in preparation for this feature shipping out of the box in one of the upcoming versions. in about:config you can: set media.autoplay.default to 1 in order to block automatic playback on all pages or set it to 2 to decide on a per domain basis. "

Cheers!

...Roland