Examine source code of eSTAR Button Activator

{
  "manifest_version": 2,
  "name": "eSTAR Button Activator",
  "version": "1.2",
  "description": "Entfernt automatisch das 'disabled' Attribut von Buttons auf allen eSTAR GmbH Subdomains.",
  "content_scripts": [
    {
      "matches": [
        "*://*.estargmbh.de/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{91cbc153-ba9e-4576-af5c-e4bedfe18739}"
    }
  }
}