# Error running in Firefox **URL:** \ **Category:** Bug Report\ **Tags:** katalon-studio, bugs-report\ **Created:** [October 29, 2018, 9:16am UTC](https://forum.katalon.com/t/error-running-in-firefox/13983 "2018-10-29T09:16:57Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Bui\_Chi\_Tai](https://avatars.discourse-cdn.com/v4/letter/b/8c91f0/32.png) [@Bui\_Chi\_Tai](https://forum.katalon.com/u/Bui_Chi_Tai)\ **Post date:** [October 29, 2018, 9:16am UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/1 "2018-10-29T09:16:57Z")
I am using Katalon 5.8.3. When running Test case in Firefox, I got the below error: (The browser display and exit immediately) Test Cases/Login FAILED because (of) (Stack trace: com.kms.katalon.core.exception.StepFailedException: Unable to open browser with url: ‘[http://10.53.252.15/SWE/logout.htm](http://10.53.252.15/SWE/logout.htm)’ (Root cause: org.openqa.selenium.WebDriverException: newSession Build info: version: ‘3.7.1’, revision: ‘8a0099a’, time: ‘2017-11-06T21:07:36.161Z’ System info: host: ‘T71DES55033’, ip: ‘192.168.122.2’, os.name: ‘Windows 8.1’, os.arch: ‘amd64’, os.version: ‘6.3’, java.version: ‘1.8.0\_181’ Driver info: driver.version: CGeckoDriver remote stacktrace: stack backtrace: 0: 0x4821c4 - 1: 0x482933 - 2: 0x445159 - 3: 0x44eff6 - 4: 0x4322e1 - 5: 0x40ba4e - 6: 0x4119b9 - 7: 0x6d2c89 - ---
**Author:** ![Brian\_Ducson](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/brian_ducson/32/603_2.png) [@Brian\_Ducson](https://forum.katalon.com/u/Brian_Ducson)\ **Post date:** [October 29, 2018, 9:22am UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/2 "2018-10-29T09:22:34Z")
You can read the Announcement items in the forum first. ---
**Author:** ![Andreas\_Voit](https://avatars.discourse-cdn.com/v4/letter/a/dbc845/32.png) [@Andreas\_Voit](https://forum.katalon.com/u/Andreas_Voit)\ **Post date:** [October 29, 2018, 1:22pm UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/3 "2018-10-29T13:22:03Z")
See for the workaround [http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63](http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63) But sadly, I found out, I could start FF, but I couldn’t capture any action. I have opened another topic for my problem, see [http://forum.katalon.com/discussion/10429/recording-doesnt-work-with-katalon-studio-5-8-3#latest](http://forum.katalon.com/discussion/10429/recording-doesnt-work-with-katalon-studio-5-8-3#latest) ---
**Author:** ![Bui\_Chi\_Tai](https://avatars.discourse-cdn.com/v4/letter/b/8c91f0/32.png) [@Bui\_Chi\_Tai](https://forum.katalon.com/u/Bui_Chi_Tai)\ **Post date:** [October 30, 2018, 1:23am UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/4 "2018-10-30T01:23:53Z")
> [Andreas Voit](https://forum.katalon.com/profile/12223/Andreas%20Voit) said: > > See for the workaround [http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63](http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63) > > But sadly, I found out, I could start FF, but I couldn’t capture any action. I have opened another topic for my problem, see [Recording doesn't work with Katalon Studio 5.8.3 - Bugs Report - Katalon Community](http://forum.katalon.com/discussion/10429/recording-doesnt-work-with-katalon-studio-5-8-3#latest) That’s worked for me. Thanks @Andreas Voit ---
**Author:** ![Andreas\_Voit](https://avatars.discourse-cdn.com/v4/letter/a/dbc845/32.png) [@Andreas\_Voit](https://forum.katalon.com/u/Andreas_Voit)\ **Post date:** [October 30, 2018, 6:44pm UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/5 "2018-10-30T18:44:43Z")
My problem got solved with the newest version 5.8.4. ---
**Author:** ![rthanisraj](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@rthanisraj](https://forum.katalon.com/u/rthanisraj)\ **Post date:** [December 12, 2018, 8:29pm UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/6 "2018-12-12T20:29:13Z")
This link doesn’t work anymore [http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63](http://forum.katalon.com/discussion/10389/known-issue-and-workaround-solution-if-you-use-firefox-63) Could someone provide the solution for this issue ? ---
**Author:** ![devalex88](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/devalex88/32/336_2.png) [@devalex88](https://forum.katalon.com/u/devalex88)\ **Post date:** [December 13, 2018, 7:06am UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/7 "2018-12-13T07:06:55Z")
Here is the new link: > [@\[UPDATED\] Known issue and workaround solution if you use Firefox 63](http://forum.katalon.com/t/updated-known-issue-and-workaround-solution-if-you-use-firefox-63/13947): > > Hi all, There is a known issue if you use Firefox 63+ to Record/Spy or for execution. When you select Firefox 63+, the following error dialog will be displayed and hence Firefox can’t be started: [Image: https://s3.amazonaws.com/katalon-forum/editor/qf/pa8hezchaz3k.png] Workaround solution: Replace the current Firefox driver with the latest version (0.23.0) Select and download the appropriate type based on your current OS:[https://github.com/mozilla/geckodriver/releases/tag/v0.23.0](https://github.com/mozilla/geckodriver/releases/tag/v0.23.0) Follow … ---
**Author:** ![rthanisraj](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@rthanisraj](https://forum.katalon.com/u/rthanisraj)\ **Post date:** [December 13, 2018, 7:42pm UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/8 "2018-12-13T19:42:53Z")
> [@devalex88](#): > > [Release v0.23.0 · mozilla/geckodriver · GitHub](https://github.com/mozilla/geckodriver/releases/tag/v0.23.0) My problem got resolved. Thank you so much Devalex88. ---
**Author:** ![system](https://europe1.discourse-cdn.com/katalon/original/3X/d/5/d55596ab02785a255798e87ede769734747b30c4.svg) [@system](https://forum.katalon.com/u/system)\ **Post date:** [December 13, 2019, 7:42pm UTC](https://forum.katalon.com/t/error-running-in-firefox/13983/9 "2019-12-13T19:42:54Z")
Closed on December 13, 2019, 7:42pm UTC This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.