Examine source code of Uni

{
  "manifest_version": 3,
  "name": "Uni",
  "description": "Building your library on the Cosense",
  "version": "2.1.5",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://scrapbox.io/api/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "uni@motosono.dev",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {}
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "/icon16.png",
      "48": "/icon48.png",
      "128": "/icon128.png"
    },
    "default_title": "Uni",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.co.jp/*/dp/*",
        "https://www.amazon.co.jp/dp/*",
        "https://www.amazon.co.jp/gp/product/*"
      ],
      "css": [
        "content-scripts/amazon.css"
      ],
      "js": [
        "content-scripts/amazon.js"
      ]
    },
    {
      "matches": [
        "https://bookwalker.jp/*"
      ],
      "css": [
        "content-scripts/bookWalker.css"
      ],
      "js": [
        "content-scripts/bookWalker.js"
      ]
    },
    {
      "matches": [
        "https://www.dlsite.com/books/work/=/product_id/*"
      ],
      "css": [
        "content-scripts/dlsite.css"
      ],
      "js": [
        "content-scripts/dlsite.js"
      ]
    },
    {
      "matches": [
        "https://www.dlsite.com/aix/cart*",
        "https://www.dlsite.com/girls/cart*",
        "https://www.dlsite.com/home/cart*",
        "https://www.dlsite.com/maniax/cart*"
      ],
      "js": [
        "content-scripts/dlsiteCart.js"
      ]
    },
    {
      "matches": [
        "https://www.dlsite.com/aix/work/=/product_id/*",
        "https://www.dlsite.com/girls/work/=/product_id/*",
        "https://www.dlsite.com/home/work/=/product_id/*",
        "https://www.dlsite.com/maniax/work/=/product_id/*"
      ],
      "css": [
        "content-scripts/dlsiteManiax.css"
      ],
      "js": [
        "content-scripts/dlsiteManiax.js"
      ]
    },
    {
      "matches": [
        "https://www.dmm.co.jp/dc/doujin/-/basket/*"
      ],
      "js": [
        "content-scripts/dmmBasket.js"
      ]
    },
    {
      "matches": [
        "https://video.dmm.co.jp/anime/content/*"
      ],
      "css": [
        "content-scripts/fanzaAnime.css"
      ],
      "js": [
        "content-scripts/fanzaAnime.js"
      ]
    },
    {
      "matches": [
        "https://book.dmm.co.jp/*"
      ],
      "css": [
        "content-scripts/fanzaBooks.css"
      ],
      "js": [
        "content-scripts/fanzaBooks.js"
      ]
    },
    {
      "matches": [
        "https://www.dmm.co.jp/dc/doujin/-/detail/=/*"
      ],
      "css": [
        "content-scripts/fanzaDoujin.css"
      ],
      "js": [
        "content-scripts/fanzaDoujin.js"
      ]
    },
    {
      "matches": [
        "https://video.dmm.co.jp/av/content/*",
        "https://www.dmm.co.jp/digital/videoa/-/detail/=/*"
      ],
      "css": [
        "content-scripts/fanzaVideo.css"
      ],
      "js": [
        "content-scripts/fanzaVideo.js"
      ]
    },
    {
      "matches": [
        "https://adult.contents.fc2.com/article/*"
      ],
      "css": [
        "content-scripts/fc2ContentMarket.css"
      ],
      "js": [
        "content-scripts/fc2ContentMarket.js"
      ]
    },
    {
      "matches": [
        "https://www.melonbooks.co.jp/detail/detail.php*"
      ],
      "css": [
        "content-scripts/melonbooks.css"
      ],
      "js": [
        "content-scripts/melonbooks.js"
      ]
    },
    {
      "matches": [
        "https://www.suruga-ya.jp/product/detail/*"
      ],
      "css": [
        "content-scripts/surugaya.css"
      ],
      "js": [
        "content-scripts/surugaya.js"
      ]
    },
    {
      "matches": [
        "https://ec.toranoana.jp/tora_r/ec/item/*",
        "https://ecs.toranoana.jp/tora/ec/item/*"
      ],
      "css": [
        "content-scripts/toranoana.css"
      ],
      "js": [
        "content-scripts/toranoana.js"
      ]
    }
  ]
}