'Block autoplay' isn't reliable
win11 ff111 The 'permissions' setting. On twitch after logging in it still plays videos on the main page or on channel pages the 'suggested video' and the background video. On youtube it also sometimes autoplays, other times - doesn't.
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You can look at these prefs on the about:config page to see what settings work for you to block autoplay.
- media.autoplay.default = 5 [0:allow;1:blockAudible;5:blockAll]
- media.autoplay.blocking_policy = 2
- media.autoplay.allow-extension-background-pages = false
- media.autoplay.block-event.enabled = true
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.