The steam helper addon is a client add-on that allows you to make requests to the steam website. In order to use it you need to give it permission to do so. This is done in the settings menu of your steam client, which allows you to do it without giving anyone else access to your account. It also allows you to send the authentication request to our server so it can be completed in the fastest way possible.

The addon is open source and can be reviewed here. The addon is not intended to be used as a way of getting around the recaptcha.