Examine source code of Snake Overlay - Play on Any Page

{
  "manifest_version": 3,
  "name": "Snake Overlay - Play on Any Page",
  "version": "0.1.0",
  "description": "Eat targets, dodge blockers and unleash power-ups. Play instantly over any webpage, no popups or extra tabs.",
  "action": {
    "default_title": "Snake Overlay"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "storage"
  ],
  "offline_enabled": true,
  "content_scripts": [
    {
      "matches": [
        "https://www.gameforbreak.com/*"
      ],
      "js": [
        "js/equip.js"
      ],
      "run_at": "document_end"
    }
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "background": {
    "service_worker": "js/background.js"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "imgs/*.png",
        "icons/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}