Examine source code of flightdata

{
  "name": "flightdata",
  "version": "1.0.1",
  "manifest_version": 3,
  "description": "Collection of web tools for flight simulation",
  "author": "hazzuk",
  "homepage_url": "https://github.com/elecordapp/flightdata-extension",
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "host_permissions": [
    "*://www.flightradar24.com/*",
    "*://dispatch.simbrief.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{703c1df4-4e8f-4ef4-93c3-2f608a346721}",
      "strict_min_version": "109.0"
    }
  },
  "background": {
    "page": "views/firefox.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.flightradar24.com/*"
      ],
      "js": [
        "scripts/content/flightradar.js"
      ]
    },
    {
      "matches": [
        "*://dispatch.simbrief.com/*"
      ],
      "js": [
        "scripts/content/simbrief.js"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "media/icon/fd-16.png",
      "32": "media/icon/fd-32.png",
      "48": "media/icon/fd-48.png",
      "128": "media/icon/fd-128.png"
    }
  },
  "icons": {
    "16": "media/icon/fd-16.png",
    "32": "media/icon/fd-32.png",
    "48": "media/icon/fd-48.png",
    "128": "media/icon/fd-128.png"
  }
}