'''bold text'''Linux Instance runnning in AWS locks up with firefox version higher than 78. Cyberark does use Xming aplication brokering. I logon to linux instance and type firefox and the page will lockup and I can't type anything in the browser. I have tried different options listed under your support page and ran many search related X11 slowness with firefox and nothing fixes the issue. Is there a bug with a specific version of Xming when using firefox? I have tried shutting down any McAfee services and the following options. Uncheck hardware acceleration about:config gfx.webrender.all set to true, browser.session.restore_on_demand to false, browser.session.restore_tabs_lazily to false and the browser does not lock, but once enter the web page it locks up. Example when I use Red Hat Satellite , it locks up and had to kill the firefox process . When I add the options above I can get into the web page like satellite, logon etc. but then it locks. I need fire fox to work on a cloud instance that does use Xming since that is what CyberArk has. The python script that use gui doesn't work.