Examine source code of Crunchyroll Free

{
  "name": "Reproductor iFrame de Crunchyroll",
  "version": "1.5.3",
  "description": "Le permite ver todos los videos de Crunchyroll de forma gratuita.",
  "author": "VirtualOx-sys",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_title": "Reproductor iFrame de Crunchyroll",
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.crunchyroll.com/*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "manifest_version": 2,
  "web_accessible_resources": [
    "interceptor.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{55c1f81b-075e-414b-99df-3a6298530495}"
    }
  }
}