Examine source code of SkyTracker

{
  "description": "Keep track of flight on skyscanner and share it with other user",
  "manifest_version": 2,
  "name": "SkyTracker",
  "version": "1.2",
  "homepage_url": "https://www.prndfam.cloud/",
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.skyscanner.it/*"
      ],
      "js": [
        "canvasjs.stock.min.js",
        "jquery-3.7.1.min.js",
        "tracker.js"
      ]
    }
  ],
  "permissions": [
    "*://www.prndfam.cloud/h/*",
    "webRequest"
  ],
  "browser_action": {
    "default_popup": "popup/choose_page.html",
    "default_icon": {
      "16": "icons/icon.png",
      "32": "icons/icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{22d6963e-1d5d-41f0-a075-95e4c1cb339d}"
    }
  }
}