Examine source code of SwiftRead

{
  "manifest_version": 2,
  "name": "SwiftRead",
  "version": "1.0.0",
  "description": "Speed‑reading overlay for any webpage. Highlights words in rapid succession to improve reading speed.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_title": "SwiftRead — Toggle Speed Reader"
  },
  "applications": {
    "gecko": {
      "id": "swiftread-mhi07s@example.com",
      "strict_min_version": "109.0"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "swiftread-mhi07s@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}