The extension fills. You submit.

Below is the real interaction, running live: an application form on the left, the extension on the right. Step through the popup, the review overlay and the post-submit capture.

A real application form

No fields filled yet · the extension inserts values and stops. Submitting is your click.

boards.greenhouse.io/datadog · apply

First name *

Last name *

Email *

Phone *

Resume / CV *

Cover letter

LinkedIn profile

Website

Are you legally authorized to work in the United States? *

Will you now or in the future require sponsorship? *

Which of the following describes your gender identity?

Desired salary

This submit button is the employer’s. Job Ledger has no code path that presses it.

Job Ledger

0.1.0

This page

Staff Software Engineer, Product Security

Datadog · matched in your ledger

9/9Exact

Never submits a form. Never fills salary or demographic questions.

It never submits

The extension fills fields and stops. There is no code path in it that calls submit or clicks a submit button — the human presses submit. This is a product constraint, not a phase-one limitation.

You see every value first

The overlay lists each proposed value with the confidence it was matched at. Edit any of them, switch any of them off, then press fill.

Some fields are never touched

SSN, date of birth, gender, race, disability, veteran status and salary expectation are on a denylist. The API does not send them and the content script refuses them — two independent guards.

Minimal permissions

host_permissions covers the known ATS domains only. Anything else is requested at the moment you first use it on that domain. A resume-reading extension asking for all_urls deserves to fail review.

Installing the unpacked build

The MV3 source lives in extension/. Load it at chrome://extensions with developer mode on and “Load unpacked”. It talks to this app’s /api/v1 surface using your signed-in session; point API_BASE in extension/background/service-worker.js at your deployment before loading it.