Examine source code of NCOverlayHelper

{
  "icons": {
    "16": "icon16.plasmo.e7bcd3ac.png",
    "32": "icon32.plasmo.ce39377b.png",
    "48": "icon48.plasmo.3c17e113.png",
    "64": "icon64.plasmo.df317abe.png",
    "128": "icon128.plasmo.6a4310c5.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.e7bcd3ac.png",
      "32": "icon32.plasmo.ce39377b.png",
      "48": "icon48.plasmo.3c17e113.png",
      "64": "icon64.plasmo.df317abe.png",
      "128": "icon128.plasmo.6a4310c5.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.2.5",
  "author": "souhait <souhait.0614@gmail.com>",
  "name": "NCOverlayHelper",
  "description": "NCOverlay本体に追加するまでもないけど個人的にほしい機能を足す拡張機能",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "permissions": [
    "storage",
    "https://*.nicovideo.jp/*",
    "https://animestore.docomo.ne.jp/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://animestore.docomo.ne.jp/animestore/mp_viw_pc*",
        "https://animestore.docomo.ne.jp/animestore/mpa_fav_pc*",
        "https://animestore.docomo.ne.jp/animestore/mpa_hst_pc*"
      ],
      "js": [
        "DanimeMyPageCommentsCounter.82bb4400.js"
      ],
      "run_at": "document_start",
      "css": []
    },
    {
      "matches": [
        "https://animestore.docomo.ne.jp/animestore/ci_pc*"
      ],
      "js": [
        "DanimeChannelCommentsCounter.cd913db7.js"
      ],
      "run_at": "document_start",
      "css": []
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ncoverlayhelper@souhait.me",
      "strict_min_version": "113.0"
    },
    "gecko_android": {
      "id": "ncoverlayhelper@souhait.me",
      "strict_min_version": "120.0"
    }
  },
  "web_accessible_resources": [
    "DanimeMyPageCommentsCounter.9870334d.css"
  ]
}