Examine source code of Tab Auto-Saver

{
  "manifest_version": 2,
  "name": "Tab Auto-Saver",
  "version": "1.0",
  "description": "Automatically saves and restores open tabs.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a7c88dc-f7c1-43c0-8f2a-e88125e2ad20}"
    }
  }
}