Examine source code of Aniwatch Plus

{
  "name": "Aniwatch Plus",
  "short_name": "AW+",
  "version": "1.1.0.0",
  "description": "Aniwatch Plus is an unofficial extension which provides several UI improvements for https://aniwatch.me.",
  "permissions": [
    "storage",
    "*://aniwatch.me/*"
  ],
  "manifest_version": 2,
  "author": "Serraniel",
  "developer": {
    "name": "Serraniel",
    "url": "https://github.com/Serraniel"
  },
  "homepage_url": "https://github.com/Serraniel/AniwatchPlus",
  "icons": {
    "48": "images/icon/icon_48.png",
    "96": "images/icon/icon_96.png"
  },
  "options_ui": {
    "page": "html/settings.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://aniwatch.me/*"
      ],
      "js": [
        "javascript/common.min.js",
        "javascript/app.min.js"
      ],
      "css": [
        "stylesheets/aniwatchplus.min.css"
      ],
      "run_at": "document_end"
    }
  ]
}