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Deployment

fetchext is designed to scale from single-user usage to enterprise deployment and repository management.

Docker

We provide an official Docker image for containerized usage.

docker run --rm -v $(pwd):/app/downloads ghcr.io/grok/fetchext download chrome <url> -o /app/downloads

Building Locally

You can build the image yourself using the provided Dockerfile:

docker build -t fetchext .

Local Repository Management

Mirroring

Keep a local folder synchronized with a list of required extensions. This is ideal for maintaining an approved list of extensions for an organization.

fext mirror extensions_list.txt --output-dir ./repo --prune

List Format:

chrome <id>
firefox <url>
edge <id>

Update Server

You can host your own Chrome/Edge Update Server or Firefox Update Manifest to serve extensions within a private network.

1. Generate Manifests:

fext update-manifest ./repo --base-url http://internal-extensions.corp.com/

This creates update.xml (Chrome/Edge) and updates.json (Firefox).

2. Serve the Repository: fetchext includes a simple HTTP server for testing or light usage:

fext serve -d ./repo -p 8080

3. Configure Browsers: Point your enterprise policies (GPO / MDM) to your internal update URL:

  • Chrome/Edge: ExtensionInstallForcelist pointing to http://.../update.xml
  • Firefox: ExtensionSettings pointing to http://.../updates.json

CI/CD Integration

Pre-commit Hook

Audit extensions committed to your repository for security risks and MV3 compatibility.

Add this to your .pre-commit-config.yaml:

- repo: https://github.com/grok/fetchext
  rev: v1.6.0
  hooks:
    - id: fext-audit
    - id: fext-scan

GitHub Actions

You can use fetchext in GitHub Actions to automatically download and analyze extensions.

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-python@v4
    with:
      python-version: '3.11'
  - run: pip install fetchext
  - run: fext audit my-extension.crx