Examine source code of TT Tracker

{
  "manifest_version": 3,
  "name": "TT Tracker",
  "description": "An unofficial plugin to make the WTT/ITTF websites friendlier for users",
  "version": "1.2.3",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "scripting",
    "tabs",
    "activeTab",
    "declarativeNetRequestWithHostAccess",
    "declarativeNetRequestFeedback"
  ],
  "host_permissions": [
    "https://wttapigateway-new.azure-api.net/*",
    "https://wttcmsapigateway-new.azure-api.net/*",
    "*://*.worldtabletennis.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tt-tracker@smoke"
    }
  },
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Table Tennis Tracker",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://worldcupresults.ittf.com/eventInfo*",
        "*://xtresults.ittf.com/teamseventInfo*"
      ],
      "run_at": "document_end",
      "css": [
        "content-scripts/ittf.css"
      ],
      "js": [
        "content-scripts/ittf.js"
      ]
    },
    {
      "matches": [
        "*://*.worldtabletennis.com/*"
      ],
      "run_at": "document_end",
      "css": [
        "content-scripts/wtt.css"
      ],
      "js": [
        "content-scripts/wtt.js"
      ]
    }
  ]
}