Examine source code of MaxSold Improver

{
  "manifest_version": 2,
  "name": "MaxSold Link Appender",
  "version": "1.0",
  "description": "Appends a fixed query string to every maxsold.com/auction/ link on the page.",
  "icons": {
    "48": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "elijahbuilditall@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ]
}