Examine source code of Json Bookmarks

{
  "manifest_version": 3,
  "name": "Json Bookmarks",
  "version": "4.0.0",
  "homepage_url": "https://github.com/1nfiniteloop/json-bookmarks",
  "description": "Import and export bookmarks between browsers with a json file",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c46bac9d-a680-46b9-ab8f-15dc7f5a8c71}"
    }
  },
  "permissions": [
    "bookmarks"
  ],
  "action": {
    "default_title": "JSON Bookmarks"
  },
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "background": {
    "scripts": [
      "third_party/browser-polyfill.min.js",
      "background.js"
    ]
  }
}