I'm not sure if that's still the case, but a few years ago you could block the ACK so the other parties couldn't know that you read the message [1] [1] https:/

I'm not sure if that's still the case, but a few years ago you could block the ACK so the other parties couldn't know that you read the message [1] [1] https://easylist-downloads.adblockplus.org/message_seen_remover_for_facebook.txt https://easylist-downloads.adblockplus.org/message_seen_remo...