mozilla/pdf.js — pull request #1337 by brendandahl (2012-03-14 22:37:03+00:00)
Title: Only enable pdfDebug for the extension if a pref is set.

As a further safety precaution the debugger stuff for the extension will now require the user to set a pref in about:config.

Setting in about:config (boolean true)
extensions.uriloader@pdf.js.pdfBug