Note: Your browser might block pop-ups which are crucial for the add-on to work. If the add-on seems stuck the first time you run it, check your browser's address bar for a pop-up icon or warning. After allowing pop-ups you might need to refresh the page. SignHero for Gmail is an add-on for the purpose of using the service directly inside user’s Gmail account. This add-on allows a user to sign PDF’s attached to an email message, store signed documents in user’s Google Drive account and create email drafts of signed documents.This is how it works: First, choose an email message with attached documents. Then, select SignHero icon on the right-side taskbar, choose files and sign. If you want to store your signed documents into Google Drive, just click the icon and the signed documents will be stored into a designated folder. You can also create an email message including signed documents and send it to others with a personalized message. You’ll need Gmail and SignHero accounts to be able to use this add-on. SignHero is a free of charge eSigning service.