Why sites continue to do this is beyond me.
But, fortunately, disabling auto-playing in Firefox is actually not that hard. about:config, then set "media.autoplay.enabled" to false. Done.
But, fortunately, disabling auto-playing in Firefox is actually not that hard. about:config, then set "media.autoplay.enabled" to false. Done.
https://addons.mozilla.org/en-US/firefox/addon/disable-autop...
or you could just use uMatrix and whitelist sites where you want video to play