Bug#772923: "Update Now" link on about:addons -> Plugins points to bad URL

[initrd.py]

Package: iceweasel
Version: 32.0.3-1

A message is shown to me today in the "Plugins" tab on about:addons,
saying "Shockwave Flash is known to be vulnerable and should be
updated.  Update Now". By clicking "Update Now" I'm sent to
https://addons.mozilla.org/en-US/iceweasel/blocked/p796 , which does
not exist. The expected URL is
https://addons.mozilla.org/en-US/firefox/blocked/p796 .