Examine source code of d-anime comments viewer

{
  "manifest_version": 2,
  "name": "d-anime comments viewer",
  "description": "dアニメストアでニコニコ動画のコメントを表示するブラウザ拡張機能",
  "version": "2026.5.5",
  "short_name": "d-comments",
  "icons": {
    "16": "/icon/16.png",
    "32": "/icon/32.png",
    "48": "/icon/48.png",
    "64": "/icon/64.png",
    "128": "/icon/128.png",
    "256": "/icon/256.png"
  },
  "author": "sopi",
  "permissions": [
    "cookies",
    "storage",
    "tabs",
    "https://*.nicovideo.jp/*",
    "https://animestore.docomo.ne.jp/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Popup",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://animestore.docomo.ne.jp/animestore/*"
      ],
      "js": [
        "content-scripts/script_addons.js"
      ]
    },
    {
      "matches": [
        "*://animestore.docomo.ne.jp/animestore/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/script_play.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "content-scripts/script_play.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7817f7db-9b81-4857-8e67-d5c32aa6b52e}"
    }
  }
}