Hmm, not sure. You may have noticed the shield icon at the left end of the address bar is a bit purplish. That indicates the Tracking Protection feature is blocking something in the page. Could you click the shield and turn off protection on the page temporarily -- just click the slider switch at the top of the drop-down panel -- and see whether that makes any difference?

Hmm, not sure. You may have noticed the shield icon at the left end of the address bar is a bit purplish. That indicates the Tracking Protection feature is blocking something in the page. Could you click the shield and turn off protection on the page temporarily -- just click the slider switch at the top of the drop-down panel -- and see whether that makes any difference?

I prefer to use Firefox but I constantly get errors Error Code: 200001 trying to play video in all Firefox and updates. This NEVER happens in BRAVE?

Also, thank you for sharing your Add-ons list. If you temporarily disable both of these two extensions, does that make any difference:

Also, thank you for sharing your Add-ons list. If you temporarily disable both of these two extensions, does that make any difference:

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

Thanks for the prompt replies. The shield fence was for facebook container. I had 3 blockers and the html5 blocker was the problem. By disabling it OFF and leaving the others ON the problem seems to have gone. The other blockers don't cause a problem. I now have to see which videos or webpages will not block autoplay.

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Your troubleshooting information shows several extensions that can block autoplay, so it is quite possible that one of them is causing this problem

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