Examine source code of Play Шикимори Online

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "default_locale": "ru",
  "homepage_url": "https://t.me/playshikionline",
  "icons": {
    "128": "play-128.png",
    "192": "play.png"
  },
  "minimum_chrome_version": "73",
  "incognito": "spanning",
  "browser_action": {
    "default_title": "Открыть историю просмотров"
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "player.html#/options",
    "open_in_tab": false
  },
  "web_accessible_resources": [
    "*",
    "anime365-player-events.js"
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "https://shikimori.one/*",
    "https://smotret-anime-365.ru/*",
    "https://smotret-anime.online/*",
    "https://api.jikan.moe/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://shikimori.org/*",
        "https://shikimori.one/*"
      ],
      "js": [
        "shikimori-watch-button.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://smotret-anime.online/translations/embed/*",
        "https://smotret-anime-365.ru/translations/embed/*",
        "https://hentai365.ru/translations/embed/*"
      ],
      "js": [
        "anime-365-inject.js"
      ],
      "css": [
        "css/anime-365-player.css"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "67.0"
    }
  },
  "description": "Расширение позволяет смотреть аниме онлайн и синхронизировать его с вашим списком на Шикимори (shikimori.org и shikimori.one)",
  "version": "1.4.2"
}