Examine source code of Metrics Dashboard

{
  "manifest_version": 3,
  "name": "Metrics Dashboard",
  "version": "1.0.0",
  "description": "Configurable metrics dashboard for Datadog and Kibana. Load custom query configurations to display KPI tables.",
  "browser_specific_settings": {
    "gecko": {
      "id": "metrics-dashboard-listed@tui.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "cookies",
    "storage",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "*://*.datadoghq.com/*",
    "*://*.datadoghq.eu/*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background/config-engine.js",
      "background/datadog-client.js",
      "background/kibana-client.js",
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.datadoghq.com/*",
        "*://*.datadoghq.eu/*"
      ],
      "js": [
        "content/datadog-content.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}