I would like to able to block the complete .io domain or at least

Via Parental Control I blocked the categorie 'Games' but it does not block all the .io games that my kids keep finding ;-) I tried blocking them via websites, but thats very inefficient because there are way to much .io games/sites to filter them one

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FOLLOW UP ON ITEM] New canisters will only be accessible through the icp0.io domain. Existing canisters will be accessible both through ic0.app and icp0. io - Developers - Internet Computer Developer Forum