Examine source code of BlockPostman

{
  "manifest_version": 2,
  "name": "BlockPostman - API Testing Extension",
  "author": "Mehrdad Javadi <mehrdaddjavadi@gmail.com>",
  "version": "1.0.1",
  "description": "BlockPostman: Lightweight HTTP/RPC API testing extension. Test APIs, debug smart contracts, and inspect blockchain interactions directly in your browser.",
  "browser_action": {
    "default_popup": "src/popup/index.html",
    "default_icon": {
      "16": "assets/icon-16.png",
      "48": "assets/icon-48.png",
      "128": "assets/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "icons": {
    "16": "assets/icon-16.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "blockpostman@example.com",
      "strict_min_version": "109.0"
    }
  }
}