Examine source code of Shikiplayer

{
  "manifest_version": 2,
  "name": "Shikiplayer",
  "icons": {
    "128": "assets/icons/icon128.png"
  },
  "author": "Kaneko Qt",
  "homepage_url": "https://github.com/qt-kaneko/Shikiplayer",
  "version": "7.0.2",
  "permissions": [
    "declarativeNetRequest",
    "*://shikimori.one/*",
    "*://kodikapi.com/*",
    "*://qt-kaneko.github.io/*",
    "*://api.anilibria.tv/*",
    "*://api.alloha.tv/*",
    "*://apicollaps.cc/*",
    "*://api.kinobox.tv/*",
    "*://spapi.cbb40446.workers.dev/*"
  ],
  "background": {
    "scripts": [
      "startFirefoxHelper.js"
    ],
    "persistent": false,
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://shikimori.one/*"
      ],
      "js": [
        "startShikiplayer.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://www.anilibria.tv/*",
        "*://beggins-as.pljjalgo.online/*",
        "*://beggins-as.allarknow.online/*",
        "*://beggins-as.algonoew.online/*",
        "*://beggins-as.stloadi.live/*"
      ],
      "js": [
        "startShikiplayer.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e6624e6b-2351-4a1d-b7b7-c714fffee424}"
    }
  }
}