Examine source code of REST Client

{
  "manifest_version": 2,
  "name": "REST Client",
  "version": "8.7",
  "description": "Send custom HTTP requests (GET, POST, PUT, PATCH, DELETE) to any URL with custom headers and body.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6af633c-ddd1-4a4d-b292-90d0548eff3c}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icon16.png",
      "32": "assets/icon32.png",
      "48": "assets/icon48.png",
      "96": "assets/icon96.png",
      "128": "assets/icon128.png"
    },
    "default_title": "REST Client",
    "default_popup": "lib/popup.html"
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "96": "assets/icon96.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "tabs"
  ]
}