This is probably the best use-case of the savings account feature in the Steem blockchain. I don't need to paste my active key thanks to a Steem-Keychain, Hive-Keychain and Hive-signer, and not to mention my password manager. Steem-Keychain means you are not going to accidentally paste the key in the memo field. The password manager is for sites that do not use Steem-Keychain but I only use my posting key. So, I avoid sites that require Steem-Connect.