I don't recommend using the keys on chrome on mobile. It's not very secure especially if you are logged in with your master key and have not activated your posting private /active private keys.

If you've done this already you can ignore the following advice.

It's better to go to the permissions tab in wallet, login with master key (current password) extract the posting private and active private keys and ONLY use your posting key using the esteem app.

You can use active to make your wallet transfers and master key to recover your account in the worst case so if you master key gets lost or stolen your a/c is gone. So be careful.