Auto Auth Filler от AlekPnv

Auto Auth Filler finds the verification code in your most recent Gmail message
and fills it into the one-time-code field on the page you are signing in to, so
you no longer have to switch to your inbox and copy it by hand.

HOW IT WORKS

1. Sign in with Google once. The only permission requested is gmail.readonly,
   so the extension cannot send, delete or modify your mail.
2. Visit any site that sends you a verification code by email.
3. The code is entered for you and the overlay shows which email it came from.

Automatic filling can be switched off in the settings if you would rather click
each time. On password fields the extension always waits for a click, whatever
the setting.

WORKS EVERYWHERE, AUTOMATICALLY

There are no site whitelists and no setup per domain. A score-based detection
engine recognises code fields by their attributes, input mode, label text and
the wording of the surrounding form, so it works on login forms, 2FA prompts
and password-reset pages across the whole web.

WHAT IT SUPPORTS

• Standard 6 to 8 digit codes
• Alphanumeric codes of 6 to 8 characters
• Hyphenated codes, numeric like 123-456 and alphanumeric like BYF-4UI
• Google G-XXXXXX codes
• Split-digit boxes, where each character has its own input
• German forms as well as English ones
• Optional auto-submit once the code is in
• A maximum code age, ten minutes by default
• A per-domain blocklist

PRIVACY

Nothing leaves your browser. There is no server, no analytics and no telemetry.
Message bodies are read in memory only for as long as it takes to look for a
code, and are never stored, logged or transmitted.

Open source under the MIT licence: https://github.com/AlekPnv/auto-auth-filler