mozilla/pdf.js — Issue #1109: Shipping labels at usps.com don't print
Author: justdave
Created: 2012-01-21 23:07:26+00:00
State: open

Steps to reproduce:
1) go to https://sss-web.usps.com/cns/landing.do
2) On the line right near the top where it says "Print a sample Domestic or International label." click on Domestic
3) Observe that nothing loads or prints, after the site says it has sent it to you.

With pdf.js disabled I get a pdf download at this point. I suspect they're loading it in a hidden iframe and calling .print() on it.