Examine source code of Tab Master Control

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "tab.master.control@patrick.dark.name"
    }
  },
  "name": "Tab Master Control",
  "version": "3.0.1resigned1",
  "developer": {
    "name": "Patrick Dark"
  },
  "description": "Replaces New Tab tabs with a tab manager and orders tabs by URL.",
  "background": {
    "scripts": [
      "background.es"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "tab.master.control.xhtml"
  },
  "icons": {
    "48": "icons/icon-48x48.png",
    "96": "icons/icon-96x96.png",
    "128": "icons/icon-128x128.png"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs"
  ]
}