1️⃣ Make sure your KeePass database is accessible

  • Log into your Nextcloud web interface.

  • Locate your KeePass database file (.kdbx).

  • Ensure it’s synced locally to your computer via the Nextcloud desktop client so Firefox plugins can open it directly from your filesystem.

    • On Linux, Windows, or macOS, this will be in your Nextcloud sync folder.

  • Do not open it from the public web — you want it stored locally and synced automatically for security.

2️⃣ Install KeePassXC (the recommended KeePass client for browser integration)

  • Download from: https://keepassxc.org/download/

  • Install it on your machine.

  • Open KeePassXC, then load your .kdbx file from your Nextcloud sync folder.

  • Unlock it with your master password (and key file if you use one).

3️⃣ Enable the Browser Integration feature in KeePassXC

  • Go to Tools → Settings → Browser Integration.

  • Check “Enable KeepassXC browser integration”.

  • Select Firefox and any other browsers you want.

  • Click OK.

4️⃣ Install the Firefox KeePassXC-Browser extension

5️⃣ Using it to autofill passwords

  • When you visit a login page:

    • Unlock your KeePassXC database if it’s locked.

    • The Firefox extension will show a key icon in the username/password field.

    • Click it, select the account, and it autofills.

  • Any new logins you create can also be saved directly to the database.

6️⃣ Security tips

  • Keep your Nextcloud client logged in so .kdbx is always up-to-date on all devices.

  • Always close KeePassXC when not using it (or set it to lock after a short idle time).

  • If using multiple devices, repeat this setup on each one.