Firefox 66 – how to block all autoplay videos

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It has been possible for more than a year to block all autoplaying videos in firefox, with and without sound, via a single setting using the about:config URL but with recent versions of firefox, other settings have been introduced. With the release of firefox 66, the new settings to change are:

media.autoplay.default = 1 (i.e. block for all sites by default)

media.autoplay.allow-muted = false (i.e. block video without sound as well)

They seem determined not to offer the ‘block everything’ option in the UI.

Comments (5)

5 responses to “Firefox 66 – how to block all autoplay videos”

  1. baskinrobbin

    Thanks for this, just changed my settings

  2. anderb

    I am unable to successfully edit my original post. After a bit more testing, the complete settings required are:


    media.autoplay.default = 1 (i.e. block for all sites by default)

    media.autoplay.allow-muted = false (i.e. block video without sound as well)

    media.autoplay.enabled = false

    media.autoplay.enabled.user-gestures-needed = false


  3. infloop

    Nice.


    Just one thing: I don't have the media.autoplay.enabled setting available to me when I do a search for "media.autoplay," but the other three I have set. Made the changes on Windows, macOS and Ubuntu 18.04.


    Also, FF is now at 66.0.1 with some security fixes.

  4. madthinus

    I love that Mozilla is pouring so much effort into Firefox still.

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