Examine source code of Padash Hadi

{
  "manifest_version": 3,
  "name": "Padash Hadi",
  "version": "6.0",
  "description": "A helper extension that automatically sets 1 as the default value in the unit field on setinrate.com.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://setinrate.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon48.png"
  },
  "author": "Omid Hosseini",
  "browser_specific_settings": {
    "gecko": {
      "id": "padash-hadi@omidhosseini"
    }
  }
}