Examine source code of CSFloat Market Checker

{
  "manifest_version": 3,
  "name": "CSFloat Market Checker",
  "short_name": "CSFloat",
  "version": "5.15.1",
  "description": "Shows the float value, paint seed, and more of Counter-Strike (CS:GO & CS2) items on the Steam Market or Inventories",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.steamcommunity.com/market/listings/730/*"
      ],
      "js": [
        "src/lib/page_scripts/market_listing.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.steamcommunity.com/id/*/tradehistory*",
        "*://*.steamcommunity.com/profiles/*/tradehistory*"
      ],
      "js": [
        "src/lib/page_scripts/trade_history.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.steamcommunity.com/id/*/inventory*",
        "*://*.steamcommunity.com/profiles/*/inventory*"
      ],
      "js": [
        "src/lib/page_scripts/inventory.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.steamcommunity.com/tradeoffer/*"
      ],
      "js": [
        "src/lib/page_scripts/trade_offer.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.steamcommunity.com/*/tradeoffers/*"
      ],
      "js": [
        "src/lib/page_scripts/trade_offers.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.steamcommunity.com/id/*",
        "*://*.steamcommunity.com/profiles/*"
      ],
      "js": [
        "src/lib/page_scripts/profile.js"
      ],
      "css": [
        "src/global.css"
      ]
    },
    {
      "matches": [
        "*://*.csfloat.com/*"
      ],
      "js": [
        "src/lib/page_scripts/csfloat.js"
      ]
    }
  ],
  "background": {
    "page": "src/background_ff.html"
  },
  "minimum_chrome_version": "109",
  "permissions": [
    "storage",
    "scripting",
    "alarms",
    "declarativeNetRequestWithHostAccess"
  ],
  "host_permissions": [
    "*://*.steamcommunity.com/market/listings/730/*",
    "*://*.steamcommunity.com/id/*/inventory*",
    "*://*.steamcommunity.com/id/*/tradehistory*",
    "*://*.steamcommunity.com/profiles/*/inventory*",
    "*://*.csfloat.com/*",
    "*://*.steampowered.com/*"
  ],
  "optional_host_permissions": [
    "*://*.steampowered.com/*"
  ],
  "externally_connectable": {
    "matches": [
      "*://*.steamcommunity.com/*",
      "*://*.csfloat.com/*"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "src/version.txt"
      ],
      "matches": [
        "https://csfloat.com/*"
      ]
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "steamcommunity_ruleset",
        "enabled": true,
        "path": "src/steamcommunity_ruleset.json"
      }
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "action": {
    "default_popup": "src/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{194d0dc6-7ada-41c6-88b8-95d7636fe43c}",
      "strict_min_version": "127.0"
    }
  }
}