Examine source code of MeatMemo

{
  "manifest_version": 3,
  "name": "MeatMemo",
  "description": "人狼サーバー「続わかめて」や「桃栗三年」でゲームをプレイする人向けの、ゲームを快適にする拡張機能です。操作方法などは「わかめてメモ」を参考にしています。",
  "version": "2.0.2",
  "icons": {
    "16": "icon/icon_16.png",
    "48": "icon/icon_48.png",
    "128": "icon/icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://jinrou.aa0.netvolante.jp/~jinrou/cgi_jinro.cgi",
        "*://124.32.233.3/~jinrou/cgi_jinro.cgi",
        "*://www7a.biglobe.ne.jp/~kuri/cgi_jinro.cgi",
        "*://alicegame.xsrv.jp/takane/game_up.php?*",
        "*://alicegame.xsrv.jp/takane/game_play.php?*"
      ],
      "js": [
        "jquery-3.6.0.slim.min.js",
        "meatmemo.js"
      ],
      "css": [
        "rewrite.css",
        "meatmemo.css"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{18531faa-a704-41db-abcc-e21910469ace}"
    }
  }
}