Examine source code of Skiproll

{
  "manifest_version": 2,
  "name": "Skiproll",
  "version": "1.0.0",
  "description": "Heighten your life",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.crunchyroll.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "script.js"
  ]
}