Examine source code of CF World Standings

{
  "name": "CF World Standings ",
  "description": "This extension filters the standings for a given contest on Codeforces to show only active competitors of a specific country.",
  "version": "1.0.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery.min.js",
        "js/background.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon16.png",
    "default_popup": "index.html",
    "default_title": "CF World Standings"
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}