Examine source code of Instagram UnHooked

{
  "name": "Instagram UnHooked",
  "version": "1.0",
  "description": "Hides instagram recommendation",
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://www.instagram.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "all_frames": true
    }
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{01d2c847-d33f-49de-8655-5d620888bfe0}"
    }
  }
}