Examine source code of GeeApps

{
  "manifest_version": 3,
  "name": "Gee Apps",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "65334fweokrfioefde@gee-apps.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "scripting",
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "*://*.gee-apps.com/*"
  ],
  "description": "Gee Apps Automation",
  "icons": {
    "64": "icons/border-64.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.navblue.aero/*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "navblue.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_icon": "icons/border-64.png",
    "default_title": "Gee Apps",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/loading.gif"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}