Examine source code of Persistent tabs

{
  "manifest_version": 2,
  "name": "Persistent Tabs Manager",
  "version": "1.1.7",
  "description": "Gerencia abas persistentes com grupos e interface amigável",
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "contextMenus",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "persistent-tabs@devassociados.com.br",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "data_collected": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Persistent Tabs",
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "options_ui": {
    "page": "manager.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}