Examine source code of DuckDuckGo Context Search

{
  "manifest_version": 3,
  "name": "DuckDuckGo Context Search",
  "version": "1.0",
  "description": "Add a context menu item to search selected text on DuckDuckGo.",
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "duckduckgocontextmenu@gmail.com",
      "strict_min_version": "58.0"
    }
  }
}