Examine source code of HiDive Next Episode

{
  "manifest_version": 2,
  "name": "Hidive Next Episode",
  "version": "1.0",
  "description": "Adds a next-episode button to pages when watching anime on HiDive",
  "homepage_url": "https://github.com/dtphelan1/hidive-next-episode-ext",
  "icons": {
    "48": "images/next-btn.svg",
    "96": "images/next-btn.svg"
  },
  "web_accessible_resources": [
    "images/next-btn.svg"
  ],
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.hidive.com/stream/*"
      ],
      "css": [
        "button.css"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{69e32763-6186-4d9c-a4b9-d16abc7a5030}"
    }
  }
}