Would Firefox's multi-account containers (<https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-US/firefox/add

Would Firefox's multi-account containers (<https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-US/firefox/addon/multi-account...>) be a way to set multimedia autoplay and other configurations on a per-site basis? You'd need to set up containers, associate them with specific websites (not sure if this is possible or I'm confusing FFMACs with Chrome's own container feature), and then of course tweak your Firefox configuration as you prefer it for the site(s) associated with each container/account.