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Overview

PassAgent browser extensions bring vault access directly into your browsing experience. Autofill credentials on login pages, generate passwords on signup forms, and manage passkeys without leaving the current tab.

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Features

Autofill

Automatically detect login forms and fill credentials from your vault. Matched by URL hostname.

Password generator

Generate strong passwords inline on any signup form. Configurable length, complexity, and character sets.

Passkey provider

Act as a WebAuthn credential provider for passkey authentication (Chrome only).

Vault search

Search your vault from the extension popup without opening the full dashboard.

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Installation

  1. Install from the Chrome Web Store
  2. Click the PassAgent icon and sign in
  3. Grant the extension permission to access page content for autofill
The Chrome extension uses Manifest V3 with a service worker architecture.

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Autofill behavior

When you navigate to a login page:
  1. The extension checks the page URL against your vault entries
  2. If a match is found, the extension icon shows a badge count
  3. Click the icon or use the keyboard shortcut to fill credentials
  4. For pages with multiple matching entries, a dropdown lets you choose

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Security model

  • Credentials are fetched from the server over HTTPS and decrypted in the extension
  • The extension authenticates with Supabase using Bearer tokens
  • No credentials are cached in local storage or the extension’s background script
  • CSRF protection is applied to all mutation requests