Examine source code of UchiHack

{
  "manifest_version": 2,
  "name": "UchiHack",
  "version": "2.4.1",
  "author": "TheAirBlow",
  "description": "Injects UchiHack v2.4.1",
  "permissions": [
    "<all_urls>",
    "tabs",
    "activeTab",
    "storage",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "96": "icons/96.png",
    "192": "icons/192.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d2d7191-3b70-4ea2-ae81-6e826b330f8a}"
    }
  }
}