Examine source code of Search Commands

{
  "name": "Search Commands",
  "description": "Default search extension that focuses on safety and privacy for technical users.",
  "version": "3.3.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "bg/background.js"
    ],
    "persistent": false
  },
  "homepage_url": "https://www.privatebrowsing-search.com/wim/ds/gotohub?s=bcpr",
  "chrome_settings_overrides": {
    "search_provider": {
      "encoding": "UTF-8",
      "favicon_url": "https://www.privatebrowsing-search.com/favicon.ico",
      "is_default": true,
      "name": "Commands",
      "keyword": "Search Commands",
      "search_url": "https://www.privatebrowsing-search.com/search/?category=web&s=bcpr&vert=private&q={searchTerms}",
      "suggest_url": "https://sug.privatebrowsing-search.com/v1/sug/?yid=bcpr&ssv=2&vert=private&q={searchTerms}"
    }
  },
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.privatebrowsing-search.com/*"
      ],
      "js": [
        "content_script/contentScript.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "contextMenus",
    "cookies",
    "storage",
    "*://*.privatebrowsing-search.com/*"
  ],
  "externally_connectable": {
    "matches": [
      "https://*.privatebrowsing-search.com/*"
    ]
  },
  "browser_action": {
    "default_title": "Search Commands"
  },
  "web_accessible_resources": [
    "img/icon16.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f3c25e1-194f-4895-8b35-693753de3031}"
    }
  }
}