Examine source code of tab list

{
  "manifest_version": 2,
  "name": "tab list",
  "description": "Show a list of open tabs for easy backup",
  "version": "1.7",
  "author": "dev@conceptualspace.net",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "List Tabs"
  },
  "permissions": [
    "tabs"
  ]
}