Few Sites mentioned below are showing a prompt - "Browser No longer supported" :
chase.com
twitter.com

Please refer to the attachments.
Loads fine with Firefox and Safari, on the same host with the same proxy.

Product Tested : JDK8u261b10
Platform Tested : Linux
Is it regression : No, fails with previous versions too.
Observations :
JDK8u251 : Fail
JDK8u231 : Fail
JDK8u191 : Fail