Examine source code of BetterFloat

{
  "manifest_version": 3,
  "name": "BetterFloat",
  "description": "Enhance your website experience on 15+ CS2 skin markets!",
  "version": "3.6.5",
  "icons": {
    "16": "icon.png",
    "32": "icon.png",
    "48": "icon.png",
    "64": "icon.png",
    "128": "icon.png"
  },
  "author": "Rums",
  "homepage_url": "https://betterfloat.com",
  "permissions": [
    "unlimitedStorage",
    "storage",
    "scripting",
    "activeTab",
    "omnibox",
    "notifications"
  ],
  "host_permissions": [
    "*://*.csfloat.com/*",
    "*://*.skinport.com/*",
    "*://*.skinbid.com/*",
    "*://*.avan.market/*",
    "*://*.bitskins.com/*",
    "*://*.cs.money/*",
    "*://*.dmarket.com/*",
    "*://*.steamcommunity.com/*",
    "*://*.steampowered.com/*",
    "*://*.gamerpay.gg/*",
    "*://*.haloskins.com/*",
    "*://*.lis-skins.com/*",
    "*://*.market.csgo.com/*",
    "*://*.rapidskins.com/*",
    "*://*.shadowpay.com/*",
    "*://*.skinbaron.de/*",
    "*://*.skinflow.gg/*",
    "*://*.skinout.com/*",
    "*://*.skin.place/*",
    "*://*.skinsmonkey.com/*",
    "*://*.skinswap.com/*",
    "*://*.swap.gg/*",
    "*://*.tradeit.gg/*",
    "*://*.waxpeer.com/*",
    "*://*.whitemarket.com/*",
    "*://*.youpin898.com/*"
  ],
  "optional_host_permissions": [
    "https://*/*",
    "http://*/*",
    "*://*.buff.market/*"
  ],
  "externally_connectable": {
    "matches": [
      "https://*.rums.dev/*"
    ]
  },
  "omnibox": {
    "keyword": "bf"
  },
  "action": {
    "default_icon": {
      "16": "icon.png",
      "32": "icon.png",
      "48": "icon.png",
      "64": "icon.png",
      "128": "icon.png"
    },
    "default_title": "BetterFloat",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "betterfloat-main.js",
        "skinport-main.js",
        "marketids.json"
      ],
      "matches": [
        "*://*.avan.market/*",
        "*://*.bitskins.com/*",
        "https://*.buff.market/*",
        "https://*.csfloat.com/*",
        "https://*.cs.money/*",
        "*://*.dmarket.com/*",
        "*://*.gamerpay.gg/*",
        "*://*.haloskins.com/*",
        "https://lis-skins.com/*",
        "*://*.market.csgo.com/*",
        "*://*.rapidskins.com/*",
        "*://*.shadowpay.com/*",
        "*://*.skinbaron.de/*",
        "https://*.skinbid.com/*",
        "*://*.skinflow.gg/*",
        "*://*.skinout.gg/*",
        "*://*.skin.place/*",
        "https://*.skinport.com/*",
        "*://*.skinsmonkey.com/*",
        "*://*.skinswap.com/*",
        "*://*.swap.gg/*",
        "https://*.tradeit.gg/*",
        "*://*.waxpeer.com/*",
        "https://*.white.market/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "betterfloat@rums.dev",
      "strict_min_version": "128.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.avan.market/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/avanmarket.js"
      ]
    },
    {
      "matches": [
        "*://*.bitskins.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/bitskins.js"
      ]
    },
    {
      "matches": [
        "https://*.buff.market/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/buffmarket.js"
      ]
    },
    {
      "matches": [
        "https://*.csfloat.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/csfloat.js"
      ]
    },
    {
      "matches": [
        "https://*.cs.money/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/csmoney.js"
      ]
    },
    {
      "matches": [
        "*://*.dmarket.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/dmarket.js"
      ]
    },
    {
      "matches": [
        "*://*.gamerpay.gg/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/gamerpay.js"
      ]
    },
    {
      "matches": [
        "*://*.haloskins.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/haloskins.js"
      ]
    },
    {
      "matches": [
        "https://lis-skins.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/lisskins.js"
      ]
    },
    {
      "matches": [
        "*://*.market.csgo.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/marketcsgo.js"
      ]
    },
    {
      "matches": [
        "*://*.rapidskins.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/rapid.js"
      ]
    },
    {
      "matches": [
        "*://*.shadowpay.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/shadowpay.js"
      ]
    },
    {
      "matches": [
        "*://*.skinbaron.de/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinbaron.js"
      ]
    },
    {
      "matches": [
        "https://*.skinbid.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinbid.js"
      ]
    },
    {
      "matches": [
        "*://*.skinflow.gg/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinflow.js"
      ]
    },
    {
      "matches": [
        "*://*.skinout.gg/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinout.js"
      ]
    },
    {
      "matches": [
        "*://*.skin.place/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinplace.js"
      ]
    },
    {
      "matches": [
        "https://*.skinport.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/skinport.js"
      ]
    },
    {
      "matches": [
        "*://*.skinsmonkey.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinsmonkey.js"
      ]
    },
    {
      "matches": [
        "*://*.skinswap.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/skinswap.js"
      ]
    },
    {
      "matches": [
        "*://*.swap.gg/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/swapgg.js"
      ]
    },
    {
      "matches": [
        "https://*.tradeit.gg/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/tradeit.js"
      ]
    },
    {
      "matches": [
        "*://*.waxpeer.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/waxpeer.js"
      ]
    },
    {
      "matches": [
        "https://*.white.market/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/whitemarket.js"
      ]
    },
    {
      "matches": [
        "*://*.youpin898.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/youpin.js"
      ]
    }
  ]
}