Printing discussion thread

Tried saving thread Dell Wyse 5070 (new) Celeron J4105, 4GB DDR4, 16GB eMMC - $89.99 + shipping (normally $450)
to PDF using “Print Friendly & PDF” plugin but it doesn’t work.
Also the standard print to pdf option in Firefox browser doesn’t work either.
Only part of a thread can be saved.

Thank you in advance for your help
Christopher