Cursor lands in a field, Focus Autofill reads what it wants — name, address, phone, OTP — and types it. Multiple profiles, an encrypted vault, live one-time-codes. It never overwrites what you typed.

Unzip to a folder you'll keep — the browser loads from it.
chrome://extensions — or in Arc, Extensions → Manage Extensions.
Toggle Developer mode (top-right), click Load unpacked, pick the focus-autofill folder.
Settings opens automatically. Add your info once — done. Pin it from the toolbar.
⌘⇧Y fills the whole page; ⌘⇧O drops in an OTP.