mozilla/pdf.js — pull request #3939 by Snuffleupagus (2013-11-19 00:48:43+00:00)
Title: Fix error in 'PdfStreamConverter.js' that prevents the user from setting a boolean preference to false

Without this small change, it's not possible to set a preference to `false` in Firefox.
This patch thus fixes a stupid mistake I made in #3850. Sorry about this, I should tested it more thoroughly!

/cc @brendandahl