Examine source code of Heat Tracker

{
  "manifest_version": 3,
  "name": "Heat Tracker",
  "version": "1.1.1",
  "description": "Heat Tracker for BGA",
  "browser_specific_settings": {
    "gecko": {
      "id": "myextension1.0@heattracker.com"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/icon_extension.png"
    },
    "default_title": "Heat Tracker"
  },
  "content_scripts": [
    {
      "matches": [
        "https://boardgamearena.com/*"
      ],
      "js": [
        "dist/contentController.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}