Examine source code of Quick Lookup

{
  "manifest_version": 2,
  "name": "Quick Lookup",
  "version": "1.0.0",
  "description": "Select any text and right-click to instantly search it on Wikipedia, IMDb, Stack Overflow, YouTube, GitHub, Wiktionary, or Google Maps.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9038dfd-dde2-46c3-9b5a-351deda81e8a}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "permissions": [
    "menus"
  ],
  "icons": {
    "48": "assets/icon.svg",
    "96": "assets/icon.svg"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  }
}