diff --git a/src/modules/misc/firefox.js b/src/modules/misc/firefox.js
index 519bf78..3200d6c 100644
--- a/src/modules/misc/firefox.js
+++ b/src/modules/misc/firefox.js
@@ -3,10 +3,12 @@ const Command = require("#lib/command.js");
 const firefox = new Command("firefox");
 firefox.category = "misc";
 firefox.helpText = "Get the approximate latest Firefox user-agent";
-firefox.callback = function (msg, line) {
+firefox.callback = function (msg, line, args, {windows}) {
   const now = Math.floor(Date.now() / 1000);
   const version = Math.floor(124 + (now - 1710892800) / 2419200);
+  let os = "X11; Linux x86_64";
+  if (windows) os = "Windows NT 10.0; Win64; x64;";
 
-  return `\`Mozilla/5.0 (X11; Linux x86_64; rv:${version}.0) Gecko/20100101 Firefox/${version}.0\``;
+  return `\`Mozilla/5.0 (${os} rv:${version}.0) Gecko/20100101 Firefox/${version}.0\``;
 };
 hf.registerCommand(firefox);