Typing a six digit number once adds a significant layer of security to a very important account. Having to type it every 31 days (per browser, per device, per

Typing a six digit number once adds a significant layer of security to a very important account. Having to type it every 31 days (per browser, per device, per account) adds very little marginal security. In fact, in my case it actively hampers security, because it keeps me from using two-factor altogether.