Previously, I have asked Xara to improve the PDF Download option as it fails to handle JavaScript and CSS properly.
It also breaks Scale to Screen and to Fit Width as it stops these features.

I have had to revert to a browser's capability to Save to PDF instead.

This demo file illustrates the Xara failings as well as my browser limitation (you have to adjust the page layout, paper size, scaling and page count).

My approach also has some merits in DTP as I can now use CSS counters to product rich page numbering by Section, Chapter, Page & Count.

JS - Website to PDF.xar

This is clearly a topic for wider discussion.