Hi Team,
I’m experiencing an issue in Katalon Studio (KS‑11.0.1) where launching the browser takes nearly five minutes during script execution. I’ve already disabled Smart Wait and cleared the project’s bin, Libs, and .cache folders to force a clean rebuild. I also reloaded the plugins, but the delay still persists. Could you please help me resolve this issue?
@kazurayam and @depapp can you kindly help Dinesh here 
hi @dm12
i experienced a similar issue about a year ago when using Katalon Studio v9
in my case the problem only happened on my macOS machine, the browser launch took several minutes
however, when running the same project on my Windows machine, it worked as expected and the browser launched blazingly fast
could you share which operating system you are using?
it might help narrow down whether the issue is OS-specific
I am using windows machine.The same project was running in different windows machine and its working as expected there.
I would suggest you to try removing Katalon Studio from your machine completely then re-install it.
After re-install only i was facing this issue
Our firewall block to download the driver, so we have manually downloaded and placed it in a driver folder. this is the same setting that we are using for the past 6 months and its worked fine
Nice to hear it.
Now I know, your are behide a firewall, so that you have a difficulty upgrading WebDrivers. On the other hand, Chrome browsers automatically upgrades itself quite often. Therefore you will have hard time keeping sync the versions of Chrome browser and ChromeDriver.
I would recommend you to talk to your network administrator and ask them to allow outgoing traffic to the WebDrivers’ download URLs.
Additionally, I would recommend you to look at “Chrome for Testing”. “Chrome for Testing” is another Chrome flavor which does NOT autoupgrade itself. You can fix its version on your machine. This makes the life of Selenium users easier. You can control the vesions of “Chrome for Testing” and ChromeDriver.
Unfortunately Katalon does not support “Chrome for Testing” well. In fact Katalon disregards the Chrome for Testing. You have to configure your project for “Chrome for Testing” yourself.
To fix 5-minute browser launch times in
Katalon Studio, force a clean rebuild by closing Katalon and deleting the bin, Libs, and .cache folders within your project directory, then restart Katalon. Additionally, update your WebDrivers to ensure they match the browser version.
Steps to Force a Clean Rebuild
Close Katalon Studio entirely to ensure files are not in use.
Navigate to your project directory.
Delete the following items:
bin folder
Libs folder
.cache folder
.classpath file (recommended)
Restart Katalon Studio and open your project. It will automatically re-index and rebuild these folders. @clean @rebuild
Are you having issues across all drivers or just chrome? have you tried geiko ?
please share your sample code, environment you are running? are you doing any heavy uplifting before browser launch?
I have done all these things, even i have re installed katalon still the issue persist
AM not doing anything newly its like a normal code only still the issue persist. and my collegue using the same project for them it launches only 15 secs. i have tried by changing laptop too. Still the same issue persist
System.setProperty(“webdriver.chrome.driver”, RunConfiguration.getProjectDir() + “/driver/chromedriver.exe”);
ChromeOptions options = new ChromeOptions();
options.addArguments(“–disable-notifications”);
DriverFactory.changeWebDriver(new ChromeDriver(options));
WebUI.navigateToUrl(‘’)
running only chrome so i have not tested with others
Please check the version of your local Chrome and ChromeDriver.
In my case, Chrome is 147.0.7727.56
ChromeDriver is 147.0.7727.56
Both are the latest and in sync.
What version do you have on your machine?
Chromedriver versions are same, the same project is working for my collegue. I have tried changing laptop too. Its not working
Please try older version Katalon Studio, such as v10.4.2.
KS-11.x.x might have some unknown issue.
Saying “the issue persist” describes nothing about your issue to others.
Do you see a Chrome browser window is opened? or no window opened?
If a browser window is opened, then what is happening in the window?
Any error mesasge in the Log Viewer?
Please share the logs in the Log Viewer.
Please kindly share your log viewer so we can help you out. It is challenging to provide assistance without enough details.
