Examine source code of Tabs_Export

{
  "manifest_version": 2,
  "name": "Tabs_Export",
  "description": "Exports all your opened tabs to an HTML file and opens all links from an HTML file as tabs.",
  "version": "1.2",
  "permissions": [
    "tabs",
    "downloads",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f726fe8-cffd-4b24-afd5-ac8aff183ff2}"
    }
  }
}