Autofill

Best in the Chrome extension

Autofill maps a form on whatever page you're looking at, then fills it from a saved profile or a CSV, including bulk runs. Doing that requires reading and writing another site's form fields directly, which browsers only allow an installed extension to do on the page itself, not a separate website in another tab. That's a browser security boundary, not a missing feature, so this one stays in the Chrome extension.

See the Chrome extension