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If you're using Firefox go to about:config and set media.autoplay.allow-muted to false. Blocks all of those pesky autoplay videos!

• Zenbit_UX 7y ago
  This is a default feature as of the latest version.
  • SECProto 7y ago
    I'm using the latest version and it was set to true.
  • jumbopapa 7y ago
    The default feature is to mute autoplay videos that have audio, so you need to enable this to prevent all autoplay.
• daphneokeefe 7y ago
  No, that doesn't stop the videos from playing. It only mutes them. You still have the visual interference of the animation, along with unwillingly downloading massive amounts of video data.
  • jumbopapa 7y ago
    That's not how it works at all... Firefox allows muted autoplay videos by default, but if you enable said flag it will prevent everything.