Examine source code of KMF-Unblock

{
  "manifest_version": 2,
  "name": "KMF-Unblock",
  "author": "Alvin Hou",
  "description": "解除『考滿分』區域限制 A Chrome and Firefox extension that bypasses KMF region restriction.",
  "version": "1.2.2",
  "icons": {
    "16": "icons/kmf-unblock-icon-16.png",
    "128": "icons/kmf-unblock-icon-128.png"
  },
  "browser_action": {
    "default_icon": "icons/kmf-unblock-icon-128.png",
    "default_title": "KMF Unblock Extension",
    "default_popup": "popup.html"
  },
  "homepage_url": "https://github.com/CryoliteZ/KMF-Unblock-Extension",
  "content_scripts": [
    {
      "matches": [
        "http://*.kmf.com/*",
        "https://*.kmf.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ]
}