Examine source code of Ecosia context search

{
  "manifest_version": 2,
  "name": "Ecosia context search",
  "description": "Adds a context menu item to search on Ecosia.org",
  "version": "1.0.3",
  "developer": {
    "name": "upollo",
    "url": "https://voila.tech/browser-extensions.php"
  },
  "applications": {
    "gecko": {
      "id": "ecosia_search@voila.tech"
    }
  },
  "icons": {
    "32": "icons/ecosia-search-32.png",
    "48": "icons/ecosia-search-48.png",
    "96": "icons/ecosia-search-96.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}