Examine source code of Page Archive Manager

{
  "manifest_version": 2,
  "name": "Page Archive Manager",
  "version": "1.0",
  "description": "Save and organize web page archives for offline reference.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Archive Manager"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60993163-e757-4dad-80ce-4f3b6a65ae31}"
    }
  }
}