Examine source code of Forem

{
  "name": "Forem",
  "version": "0.1.3",
  "description": "For Empowering Community",
  "manifest_version": 2,
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@forem",
      "strict_min_version": "42.0"
    }
  }
}