Examine source code of Listings-B-Gone

{
  "manifest_version": 3,
  "name": "Listings-B-Gone",
  "version": "1.0.1",
  "description": "Make de-listing Steam Community Market items a bazillion times easier with this simple extension.",
  "host_permissions": [
    "*://*.steamcommunity.com/market"
  ],
  "content_scripts": [
    {
      "css": [
        "css/listings_b_gone_style.css"
      ],
      "js": [
        "js/scmMainPageScript.js"
      ],
      "matches": [
        "*://*.steamcommunity.com/market",
        "*://*.steamcommunity.com/market/"
      ]
    }
  ],
  "action": {
    "default_icon": "images/icon_48.png"
  },
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/images/*.png",
        "/images/*.gif"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "negrocancerigeno@hotmail.com.listings.b.gone"
    }
  }
}