Examine source code of Crunchyroll Queue

{
  "description": "This Extension create a external queue for one account Crunchyroll and too many users",
  "manifest_version": 2,
  "name": "Crunchyroll Queue",
  "version": "3.2",
  "homepage_url": "https://github.com/Lordhulk/crunchyroll-queue",
  "icons": {
    "512": "icons/border-512.png"
  },
  "permissions": [
    "storage",
    "*://*.crunchyroll.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.crunchyroll.com/home/queue"
      ],
      "js": [
        "backgroundJs/addButton.js"
      ]
    },
    {
      "matches": [
        "*://*.crunchyroll.com/*/home/queue"
      ],
      "js": [
        "backgroundJs/addButton.js"
      ]
    },
    {
      "matches": [
        "*://*.crunchyroll.com/*/*-*"
      ],
      "js": [
        "backgroundJs/episodeButton.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/border-512.png",
    "default_title": "Crunchyroll Queue",
    "default_popup": "popup/queue.html"
  },
  "web_accessible_resources": [
    "icons/border-512.png",
    "icons/Delete.png",
    "icons/crown_gold.png"
  ],
  "background": {
    "scripts": [
      "backgroundJs/background.js"
    ]
  }
}