# Browser Alerts not popping up in katalon launched Mozilla firefox browser instance , Manually launched Mozilla Firefox instance is popping up the browser alerts **URL:** \ **Category:** Web Testing\ **Tags:** katalon-studio\ **Created:** [October 9, 2021, 4:54am UTC](https://forum.katalon.com/t/browser-alerts-not-popping-up-in-katalon-launched-mozilla-firefox-browser-instance-manually-launched-mozilla-firefox-instance-is-popping-up-the-browser-alerts/59035 "2021-10-09T04:54:09Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Russ\_Thomas](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/russ_thomas/32/11884_2.png) [@Russ\_Thomas](https://forum.katalon.com/u/Russ_Thomas)\ **Post date:** [October 10, 2021, 8:34am UTC](https://forum.katalon.com/t/browser-alerts-not-popping-up-in-katalon-launched-mozilla-firefox-browser-instance-manually-launched-mozilla-firefox-instance-is-popping-up-the-browser-alerts/59035/2 "2021-10-10T08:34:05Z")
If these are indeed `window.alert()` dialogs, they probably ARE being launched but dismissed so quickly you can’t see them. With such little information, that is the best I can offer. You might try reading this: > [@\[TIP\] How To Help Us Help You!](http://forum.katalon.com/t/tip-how-to-help-us-help-you-my-test-is-broken-nothing-works-updated-nov-2019/12919): > > My test is BROKEN! NOTHING WORKS! HELP ME! Relax. We get it. We really do. There are some pretty smart and clever people on this forum, but you must realize, they are not magicians or wizards or gods. They cannot see your code, they can’t see your errors and they don’t even know what your AUT is meant to do even though it might seem perfectly obvious to you. So please relax and follow the advice below, before you start writing your post. The advice below will tell you the exact information … --- _[View the full topic](https://forum.katalon.com/t/browser-alerts-not-popping-up-in-katalon-launched-mozilla-firefox-browser-instance-manually-launched-mozilla-firefox-instance-is-popping-up-the-browser-alerts/59035)._