Examine source code of xs customizer

{
  "description": "customizing cross server requests",
  "manifest_version": 2,
  "name": "xs customizer",
  "version": "1.3resigned1",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background2.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup/choose_page.html",
    "default_icon": {
      "16": "icons/page-16.png",
      "32": "icons/page-32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd07459b-1215-4828-be18-0e2499a107ed}"
    }
  }
}