Examine source code of Inline Value key

{
  "manifest_version": 3,
  "name": "Inline Value key",
  "version": "10",
  "description": "Adds fast inline step controls for numeric input fields with smooth interaction and cancel support.",
  "author": "Omid Hosseini",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://setinrate.com/room*",
        "*://www.setinrate.com/room*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [],
  "host_permissions": [
    "*://setinrate.com/*",
    "*://www.setinrate.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "inline-spinner@omidh.dev",
      "strict_min_version": "109.0"
    }
  }
}