Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Performance on Webapplications using lots of pdf-files is low

  • 3 replies
  • 2 have this problem
  • 109 views
  • Last reply by Mike Kaply
  • Open

kerstin.trull
kerstin.trull

Hi,

When switching from FF 128esr to 140esr our customers noticed a massive impact in performance for certain webapplications. All Applications effected heavily use pdf-files, users are working mostly exclusive in firefox. Performance is ok when the day starts but gets bad fast. Sooner or later working is no longer possible and firefox needs to be restarted.

The users work on Citrix Desktops, but difference in performance is also seen in Firefox localy (not as bad but its there). Cross-tests with another browser are not possible, because the application works only in FF.

We tried removing almost all policies effective to rule out a specific hardening setting We tried every setting we could find linked to cache (as it seemed related to that) but without success. We collected logs with the Firefox-internal Tools but could not identify a specific Problem.

Any Help is apreciated, thx in advance

Hi, When switching from FF 128esr to 140esr our customers noticed a massive impact in performance for certain webapplications. All Applications effected heavily use pdf-files, users are working mostly exclusive in firefox. Performance is ok when the day starts but gets bad fast. Sooner or later working is no longer possible and firefox needs to be restarted. The users work on Citrix Desktops, but difference in performance is also seen in Firefox localy (not as bad but its there). Cross-tests with another browser are not possible, because the application works only in FF. We tried removing almost all policies effective to rule out a specific hardening setting We tried every setting we could find linked to cache (as it seemed related to that) but without success. We collected logs with the Firefox-internal Tools but could not identify a specific Problem. Any Help is apreciated, thx in advance

All Replies (3)

Mike Kaply
Mike Kaply
  • Moderator
Mozilla Staff

We don't know of anything specific that would cause this.

Would be willing to open a bugzilla bug so we could work with you to get more details?

kerstin.trull
kerstin.trull Question owner

Hello Mike, Thank you for the reply. I sure can do that. Maybe you can help me with the process?

Mike Kaply
Mike Kaply
  • Moderator
Mozilla Staff

Of course.

You can open the bug here:

https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&component=PDF%20Viewer

You'll need to create an account.

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.