Examine source code of Wanderers Guide GM Screen

{
  "manifest_version": 3,
  "version": "2.0.5",
  "short_name": "PF2 GM-Screen",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.bundle.js"
    ],
    "service_worker": "background.bundle.js"
  },
  "content_scripts": [
    {
      "matches": [
        "*://wanderersguide.app/*"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://wanderersguide.app/campaign/*?dmScreen=1&c=*"
      ],
      "js": [
        "prepareScreen.bundle.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://wanderersguide.app/sheet/*?dmScreen=1"
      ],
      "js": [
        "valueExtractor.bundle.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "action": {
    "default_icon": "img/dndSingle64.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://wanderersguide.app/"
  ],
  "icons": {
    "128": "img/dndScreen128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "fetchOverride.bundle.js"
      ],
      "matches": [
        "*://wanderersguide.app/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "wgGmscreen@dicetable.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}