Examine source code of Myanimelist Redesign 2

{
  "manifest_version": 2,
  "name": "Myanimelist Redesign",
  "description": "A redesigned user interface for Myanimelist with multiple themes and layout improvements",
  "version": "1.7.5",
  "minimum_chrome_version": "55",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "55.0",
      "id": "{849e520a-af24-45fe-9da7-946dcc8514ac}"
    }
  },
  "icons": {
    "128": "images/logo.png",
    "256": "images/logo_256.png",
    "512": "images/logo_512.png"
  },
  "browser_action": {
    "default_icon": "images/logo.png",
    "default_popup": "menu/menu.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "https://myanimelist.net/*",
    "storage"
  ],
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://myanimelist.net/*"
      ],
      "js": [
        "javascript/anime.min.js",
        "javascript/hammer.min.js",
        "javascript/functionX.js",
        "javascript/mal_redesigned.js"
      ]
    },
    {
      "run_at": "document_start",
      "matches": [
        "https://myanimelist.net/ownlist/*"
      ],
      "js": [
        "javascript/mal_redesigned_iframe.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "images/*",
    "bbeditor/*"
  ]
}