Examine source code of New Library Detector

{
  "manifest_version": 2,
  "name": "Library Detector",
  "short_name": "Library Detector",
  "version": "6.2.0",
  "web_accessible_resources": [
    "library/libraries.js",
    "content_scripts/lib_detect.js"
  ],
  "description": "Detects the Javascript libraries running on a page and displays their icons in the address bar.",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "library/libraries.js",
      "background_scripts/main.js"
    ],
    "persistent": false
  },
  "page_action": {
    "default_icon": {
      "19": "icons/icon19.png",
      "38": "icons/icon38.png"
    },
    "default_title": "Library Detector"
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_scripts/inject.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_scripts/detect.js"
      ],
      "run_at": "document_idle"
    }
  ]
}