Examine source code of Tab Namer

{
  "manifest_version": 2,
  "name": "Tab Namer",
  "version": "1.3resigned1",
  "description": "Renames tabs to: \"<index> <original_name> <hostname>\".",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{64d544ce-a322-4533-9369-2037011bbd4d}"
    }
  }
}