Examine source code of eBay Seller Tools

{
  "manifest_version": 3,
  "name": "eBay Seller Tools",
  "version": "1.1",
  "description": "Shows Average Sell/List Price and Sell-through rate on eBay. Also use Alt+A to quickly toggle Active/Sold items on eBay and Facebook Marketplace.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ebay-seller-tools@brad.codes",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "action": {
    "default_title": "Toggle Active/Sold Items"
  },
  "commands": {
    "toggle-items": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Toggle Sold/Active Items"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ebay.com/sch/*",
        "*://*.ebay.com.au/sch/*",
        "*://*.ebay.co.uk/sch/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  }
}