Examine source code of Ten Minute Tabs

{
  "manifest_version": 2,
  "name": "Ten Minute Tabs",
  "version": "1.1resigned1",
  "description": "Adds a toolbar button enabling you to launch a temporary tab that will prompt you to close it after 10 minutes, keeping you from wasting too much time going down rabbit holes.",
  "icons": {
    "48": "icons/time-tab-48.png"
  },
  "permissions": [
    "<all_urls>",
    "alarms"
  ],
  "browser_action": {
    "default_area": "tabstrip",
    "default_icon": "icons/time-tab-32.png",
    "default_title": "Ten Minute Tab"
  },
  "background": {
    "scripts": [
      "ten_minute_tabs.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{90308d47-d614-4221-a207-3ca61b239d57}"
    }
  }
}