Security Advisory: Firefox exploit found in the wild

You are advices to set configure the following setting in Tor Browser in Whonix:
Edit -> Preferences -> Applications ->Portable Document Format (PDF) -> Save File

You are advices to update as soon as updates are available. This blog post will be updated as new information come in.

(Do that same with Firefox / Iceweasel if you are using that elsewhere.)

Problem description at Mozilla Firefox blog:

Impact in Whonix:
– Unless you were using AppArmor, local files within the VM would be accessible.

Vulnerable browsers:
Tor Browser
– Firefox
– Iceweasel

Tor Browser upstream Bug report:

Whonix forum discussion:,1495.0.html

Patrick started developing Whonix, the Anonymous Operating System in 2012, when quickly others joined efforts. He collected experiences working pseudonymous on Whonix for two years, enjoys collaboratively working on privacy preserving software.