Examine source code of 7wasd

{
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDescription__",
  "version": "5.7.23",
  "manifest_version": 3,
  "default_locale": "en",
  "icons": {
    "16": "/assets/icons/icon-16.png",
    "32": "/assets/icons/icon-32.png",
    "48": "/assets/icons/icon-48.png",
    "128": "/assets/icons/icon-128.png"
  },
  "action": {
    "default_popup": "/popup.html",
    "default_icon": "/assets/icons/icon-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "/content.js"
      ],
      "run_at": "document_end",
      "matches": [
        "https://*.wasd.tv/*"
      ],
      "css": [
        "/content.css"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "/background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c322fb2d-285f-4add-ac56-5cd2656b68a1}",
      "strict_min_version": "112.0"
    }
  }
}