Examine source code of Pinterest Iran Proxy

{
  "manifest_version": 2,
  "name": "Pinterest Iran Proxy",
  "version": "1.0.0",
  "description": "Automatically redirects blocked Pinterest image URLs for Iranian users to accessible proxy servers.",
  "author": "tera",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "*://*.pinterest.com/*",
    "*://*.pinterest.co.uk/*",
    "*://*.pinterest.ca/*",
    "*://*.pinterest.fr/*",
    "*://*.pinterest.de/*",
    "*://*.pinterest.es/*",
    "*://*.pinterest.it/*",
    "*://*.pinterest.jp/*",
    "*://*.pinterest.kr/*",
    "*://*.pinterest.com.au/*",
    "*://*.pinterest.com.mx/*",
    "*://*.pinterest.pt/*",
    "*://*.pinterest.se/*",
    "*://*.pinterest.dk/*",
    "*://*.pinterest.no/*",
    "*://*.pinterest.fi/*",
    "*://*.pinterest.cl/*",
    "*://*.pinterest.ph/*",
    "*://*.pinterest.at/*",
    "*://*.pinterest.ch/*",
    "*://*.pinterest.ie/*",
    "*://*.pinterest.nz/*",
    "*://*.pinimg.com/*",
    "http://ip-api.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.pinterest.com/*",
        "*://*.pinterest.co.uk/*",
        "*://*.pinterest.ca/*",
        "*://*.pinterest.fr/*",
        "*://*.pinterest.de/*",
        "*://*.pinterest.es/*",
        "*://*.pinterest.it/*",
        "*://*.pinterest.jp/*",
        "*://*.pinterest.kr/*",
        "*://*.pinterest.com.au/*",
        "*://*.pinterest.com.mx/*",
        "*://*.pinterest.pt/*",
        "*://*.pinterest.se/*",
        "*://*.pinterest.dk/*",
        "*://*.pinterest.no/*",
        "*://*.pinterest.fi/*",
        "*://*.pinterest.cl/*",
        "*://*.pinterest.ph/*",
        "*://*.pinterest.at/*",
        "*://*.pinterest.ch/*",
        "*://*.pinterest.ie/*",
        "*://*.pinterest.nz/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "*.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8743330e-99bb-4de5-8687-d8c4db588623}"
    }
  }
}