We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

Firefox with TLS 1.3 enabled crashes IIS10

  • 1 (رد واحد)
  • 1 has this problem
  • 9 views
  • آخر ردّ كتبه the-edmeister

johnh9128
johnh9128
more options

We're testing a website on Windows Server 2016 TP4 (IIS 10). The web site uses SSL and frames. When we access the site with Firefox 40 or higher, multiple IIS Worker Processes start running using large amounts of CPU time. Other browser accesses then fail with 500 errors. If we kill the long running Worker Processes, normal operation is restored. If we go into about:config and change SECURITY_TLS_VERSION_MAX from 3 to 2, the problem goes away. Appears that this option changes the max TLS version from 1.3 to 1.2. Is there any fix for this behavior?

We're testing a website on Windows Server 2016 TP4 (IIS 10). The web site uses SSL and frames. When we access the site with Firefox 40 or higher, multiple IIS Worker Processes start running using large amounts of CPU time. Other browser accesses then fail with 500 errors. If we kill the long running Worker Processes, normal operation is restored. If we go into about:config and change SECURITY_TLS_VERSION_MAX from 3 to 2, the problem goes away. Appears that this option changes the max TLS version from 1.3 to 1.2. Is there any fix for this behavior?

All Replies (1)

the-edmeister
the-edmeister
  • Moderator
more options

This forum is for Firefox end user support. Please see this KB article. https://support.mozilla.org/en-US/kb/where-go-developer-support