Examine source code of Freighter

{
  "name": "Freighter",
  "version": "5.48.0",
  "version_name": "5.48.0",
  "description": "Freighter is a non-custodial wallet extension that enables you to sign Stellar transactions via your browser.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ee0dd4e-8c64-4b92-b539-25718a10f62f}"
    }
  },
  "background": {
    "service_worker": "background.min.js",
    "scripts": [
      "background.min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.min.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "sidePanel"
  ],
  "side_panel": {
    "default_path": "index.html?mode=sidebar"
  },
  "sidebar_action": {
    "default_panel": "index.html?mode=sidebar",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png"
    },
    "open_at_install": false
  },
  "manifest_version": 3
}