Examine source code of Startup Bookmarks

{
  "author": "igorlogius",
  "homepage_url": "https://github.com/igorlogius/webextensions/tree/main/sources/startup-bookmarks",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Open a set of bookmarks on browser startup",
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_area": "navbar",
    "default_popup": "dialog.html"
  },
  "manifest_version": 2,
  "name": "Startup Bookmarks",
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "version": "1.7.18",
  "browser_specific_settings": {
    "gecko": {
      "id": "{d026fcc5-d071-4ddd-bbc0-66ccf814693d}"
    }
  }
}