Mozilla performing pdf.js DNS queries?

David Hofstee david at
Thu Nov 13 13:39:23 UTC 2014

Pdf is quite a standard. One might wonder what it cannot do. One could call it evil. 

David Hofstee

Deliverability Management
MailPlus B.V. Netherlands (ESP)

-----Oorspronkelijk bericht-----
Van: NANOG [mailto:nanog-bounces at] Namens Seth Mos
Verzonden: Thursday, November 13, 2014 2:26 PM
Aan: NANOG list
Onderwerp: Mozilla performing pdf.js DNS queries?


Whilst rummaging through some DNS (dnsmasq) logs I've noticed quite a decent amount of queries for pdf.js from what appear to be mozilla browsers.

Seems rather odd that it is performing DNS queries for a internal PDF viewer.

Has anyone else come across these lookups?

Kind regards,


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