Co Apply

Co Apply is a browser extension that autofills web forms on any site by combining stored personal data with an AI knowledge base. It is built specifically for Firefox using Manifest V3 and relies on DeepSeek as its default model.

The extension works by letting users first configure personal data, FAQ entries, and an API key in its settings. When a page containing a form is visited, a floating Auto Fill button appears. Clicking the button causes Co Apply to extract all form fields, send the context along with the stored data to DeepSeek, and populate matching fields. Each filled field receives a green verification badge while unfilled fields receive an orange badge, allowing manual review before the user submits the form manually.

It detects a wide range of form elements including inputs, textareas, selects, radio buttons, checkboxes, contentEditable elements, and ARIA widgets, even when they lie outside standard form tags. The AI component interprets labels, placeholders, ARIA attributes, and surrounding text to decide how to match fields to user data. Personal information can be stored in freeform text covering details such as name, contact information, experience, and preferences. A reusable FAQ section stores answers for open-ended questions such as "Tell us about yourself". The extension also supports file attachments.

Co Apply is developed by Shajan Jacob and its source code is available for viewing. It is delivered as a Firefox browser extension.