If it's specific to one website and happens across multiple devices, it's likely an issue with the website itself. If you report the issue to the website developer, they can address the issue.

The same website works fine in Chrome, we are the application developers. Like i said the slowness happends on all machines it is not machine specific.

Are you able to post a link to the website in question? We would really only be guessing without actually seeing the issue first-hand.

See also:

• https://developer.mozilla.org/en-US/docs/Tools/Performance

https://www.quincdiscovery.com/loginpage.html username:administrator password: abc123 after you hit login and mail page loads, there is dropdown called "select case" click on dropdown to see the issue.

if main page does not load please hit refresh button.

arvind.chigurala said

https://www.quincdiscovery.com/loginpage.html username:administrator password: abc123 after you hit login and mail page loads, there is dropdown called "select case" click on dropdown to see the issue. if main page does not load please hit refresh button.

Do you have enough information to investigate the problem ?

I was not able to reproduce the issue. The checkboxes were a little slow when I selected them, but nothing crashed. It all appeared to work as normal.

I have Firefox 68 with no browser extensions installed and only the standard content blocking settings in place.

https://accessdata.webex.com/accessdata/lsr.php?RCID=d4e225fa00ce4d9d8f0e0cb4fc3bfd86

I created a small video to show problem, with new browser first time it worked fine , second time it shows the behavior may be you will see it now.

Did the video help and were you able to reproduce the problem

Sorry, I didn't see the video that you posted at first.

I have no such problems on my end. There is a slight delay between when I click the checkbox and when it actually gets selected, suggesting to me that there is some Javascript code that is doing a lot of work.

I can see that there is a loop of code that runs when you click a checkbox, which I originally suspected was running infinitely but that doesn't seem to be the issue. If it were, it would crash on my end as well.

Unfortunately, the variables of the code are not easily identifiable, so it's difficult for me to pinpoint exactly what it's doing. There were no unusual error messages that appeared for me in the browser console to suggest an error though.

I can't help but think perhaps your question would be more suited for a coding community like Stack Overflow.

is there any way we can do a screen sharing session, so i can show it.

Build 48 and less did not have this problem.

Like I said, I'm not able to reproduce the issue. I've tried multiple versions of Firefox on multiple systems without the described issue. This is likely a code issue, which is best suited for a coding community for support.

I'm not seeing problems with the checkboxes as well, they respond immediately with a click.

You can create a new profile to test if your current profile is causing the problem.

See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

Thanks for suggestion, when i create new profile site loads fine and no delays. If I close the browser and come back again browser is stuck again. We are creating a aws VM where you can see this issue consistently. for giving you access to VM, i need you public ip. Please let me know.