Examine source code of trovu.net

{
  "manifest_version": 3,
  "name": "trovu.net",
  "version": "1.0.6",
  "description": "Web search like a command line: With keyword & query go directly to search results of websites. DuckDuckGo bangs on steroids.",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{12e69d3f-3cc3-4868-bd56-1976253f65ec}",
      "strict_min_version": "58.0"
    }
  },
  "commands": {
    "open_tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+1"
      },
      "description": "Open a new tab with Trovu"
    },
    "open_window": {
      "suggested_key": {
        "default": "Ctrl+Shift+2"
      },
      "description": "Open a new window with Trovu"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "action": {
    "default_icon": {
      "16": "./img/icons/16.png",
      "32": "./img/icons/32.png",
      "48": "./img/icons/48.png",
      "64": "./img/icons/64.png",
      "96": "./img/icons/96.png",
      "128": "./img/icons/128.png"
    },
    "default_title": "Open options"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "./img/icons/16.png",
    "32": "./img/icons/32.png",
    "48": "./img/icons/48.png",
    "64": "./img/icons/64.png",
    "96": "./img/icons/96.png",
    "128": "./img/icons/128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "./json/countries.en.min.json",
        "./json/languages.en.min.json"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}