You should probably direct your anger to the author of the article for exposing this to people like your druggie cousin who comes over for your birthday party if that's your main concern.
As long as your password keychain is unsecured, EVERY browser does this -- it's just a matter of knowing where the passwords are stored in the browser as plaintext. If you don't want people to access your accounts, then secure them. You can't have your cake and eat it too. Either your passwords are conveniently stored in plaintext so you can login easier, or you take actions to secure your account and add a step to the login process.
As long as your password keychain is unsecured, EVERY browser does this -- it's just a matter of knowing where the passwords are stored in the browser as plaintext. If you don't want people to access your accounts, then secure them. You can't have your cake and eat it too. Either your passwords are conveniently stored in plaintext so you can login easier, or you take actions to secure your account and add a step to the login process.