# Unable to open browser with url: '' (Root cause: org.openqa.selenium.WebDriverException: newSession **URL:** \ **Category:** Feature Request\ **Tags:** feature-request, katalon-studio\ **Created:** [October 24, 2018, 11:32pm UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912 "2018-10-24T23:32:54Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![PeterH](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@PeterH](https://forum.katalon.com/u/PeterH)\ **Post date:** [October 24, 2018, 11:32pm UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/1 "2018-10-24T23:32:54Z")
After Firefox updated from v62, the test cases are unable to launch Firefox with error of Unable to open browser with url: ‘’ (Root cause: org.openqa.selenium.WebDriverException: newSession. New Gecko driver needed if you have firefox 63.0(64-bit). Error observed with Katalon studio 5.7.0 and 5.8.3. Current Geckodriver version 19 should be updated to v23 from [GitHub - mozilla/geckodriver: WebDriver Classic proxy for automating Firefox through Marionette](https://github.com/mozilla/geckodriver) in \configuration\resources\drivers\firefox\_win64 directory which would resolve that error. ---
**Author:** ![Jacqueline\_Lin](https://avatars.discourse-cdn.com/v4/letter/j/58956e/32.png) [@Jacqueline\_Lin](https://forum.katalon.com/u/Jacqueline_Lin)\ **Post date:** [October 25, 2018, 2:23am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/2 "2018-10-25T02:23:01Z")
Hi Peter, I downloaded the Geckodriver v23 and running the .exe file does not do anything? (This is my first time installing this driver). And, where do I find \configuration\resources\drivers\firefox\_win64 directory? Appreciate if you could help. Thanks. ---
**Author:** ![Richard\_Stumpf](https://avatars.discourse-cdn.com/v4/letter/r/c37758/32.png) [@Richard\_Stumpf](https://forum.katalon.com/u/Richard_Stumpf)\ **Post date:** [October 25, 2018, 5:23am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/3 "2018-10-25T05:23:37Z")
Hi Peter, I just installed Katalon Studio and am having a similar problem with Firefox on Windows 7 with the message: Unable to open browser with url: ‘’ (Root cause: No driver is set for execution.) I updated to the Geckodriver v23 but it still gives the same message, any suggestions? Thanks. ---
**Author:** ![Vidyasagar\_Sakaray](https://avatars.discourse-cdn.com/v4/letter/v/e79b87/32.png) [@Vidyasagar\_Sakaray](https://forum.katalon.com/u/Vidyasagar_Sakaray)\ **Post date:** [October 25, 2018, 6:34am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/4 "2018-10-25T06:34:48Z")
Guys, once try out Geckodriver v21. It is working fine for me. Here’s the link : [https://github.com/mozilla/geckodriver/releases](https://github.com/mozilla/geckodriver/releases) ---
**Author:** ![Jacqueline\_Lin](https://avatars.discourse-cdn.com/v4/letter/j/58956e/32.png) [@Jacqueline\_Lin](https://forum.katalon.com/u/Jacqueline_Lin)\ **Post date:** [October 25, 2018, 7:50am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/5 "2018-10-25T07:50:06Z")
> [Jacqueline Lin](https://forum.katalon.com/profile/6457/Jacqueline%20Lin) said: > > Hi Peter, > > I downloaded the Geckodriver v23 and running the .exe file does not do anything? (This is my first time installing this driver). And, where do I find \configuration\resources\drivers\firefox\_win64 directory? Appreciate if you could help. Thanks. Hi, Can anyone guide me after running Geckodriver.exe what should I do? Thanks. ---
**Author:** ![Vidyasagar\_Sakaray](https://avatars.discourse-cdn.com/v4/letter/v/e79b87/32.png) [@Vidyasagar\_Sakaray](https://forum.katalon.com/u/Vidyasagar_Sakaray)\ **Post date:** [October 25, 2018, 8:46am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/6 "2018-10-25T08:46:25Z")
> Jacqueline Lin said: > > > Jacqueline Lin said: > > > > Hi Peter, > > > > I downloaded the Geckodriver v23 and running the .exe file does not do anything? (This is my first time installing this driver). And, where do I find \configuration\resources\drivers\firefox\_win64 directory? Appreciate if you could help. Thanks. > > Hi, > > Can anyone guide me after running Geckodriver.exe what should I do? Thanks. As I mentioned earlier, download the geckodriver.exe v21 from the link. [https://github.com/mozilla/geckodriver/releases](https://github.com/mozilla/geckodriver/releases) Extract the zip file, copy the geckodriver.exe file and go to your Katalon Studio folder(where you have katalon.exe file), and from there, navigate to configuration\resources\drivers\firefox\_win64 folder. There you will find an existing geckodriver.exe file. Just delete it, and paste the geckodriver.exe file which you copied previously, As shown in the image. ![](https://s3.amazonaws.com/katalon-forum/editor/m3/evupo0fmawgs.png "Image: https://s3.amazonaws.com/katalon-forum/editor/m3/evupo0fmawgs.png") [Screenshot (33).png](https://s3.amazonaws.com/katalon-forum/editor/m3/evupo0fmawgs.png) ---
**Author:** ![Jacqueline\_Lin](https://avatars.discourse-cdn.com/v4/letter/j/58956e/32.png) [@Jacqueline\_Lin](https://forum.katalon.com/u/Jacqueline_Lin)\ **Post date:** [October 30, 2018, 9:31am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/7 "2018-10-30T09:31:19Z")
> [Vidyasagar Sakaray](https://forum.katalon.com/profile/12042/Vidyasagar%20Sakaray "Link: /profile/12042/Vidyasagar%20Sakaray") said: > > > Jacqueline Lin said: > > > > > Jacqueline Lin said: > > > > > > Hi Peter, > > > > > > I downloaded the Geckodriver v23 and running the .exe file does not do anything? (This is my first time installing this driver). And, where do I find \configuration\resources\drivers\firefox\_win64 directory? Appreciate if you could help. Thanks. > > > > Hi, > > > > Can anyone guide me after running Geckodriver.exe what should I do? Thanks. > > As I mentioned earlier, download the geckodriver.exe v21 from the link. > > [https://github.com/mozilla/geckodriver/releases](https://github.com/mozilla/geckodriver/releases) > > Extract the zip file, copy the geckodriver.exe file and go to your Katalon Studio folder(where you have katalon.exe file), and from there, navigate to > > configuration\resources\drivers\firefox\_win64 folder. > > There you will find an existing geckodriver.exe file. Just delete it, and paste the geckodriver.exe file which you copied previously, As shown in the image. ![](https://s3.amazonaws.com/katalon-forum/editor/m3/evupo0fmawgs.png "Image: https://s3.amazonaws.com/katalon-forum/editor/m3/evupo0fmawgs.png") Thanks! I’m able to run the test in Firefox browser now. 🙂 ---
**Author:** ![Jass](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/jass/32/9588_2.png) [@Jass](https://forum.katalon.com/u/Jass)\ **Post date:** [February 28, 2020, 10:28am UTC](https://forum.katalon.com/t/unable-to-open-browser-with-url-root-cause-org-openqa-selenium-webdriverexception-newsession/13912/8 "2020-02-28T10:28:17Z")
Closed on February 28, 2020, 10:28am UTC