Boris Zbarsky <bzbarsky@mit.edu> has asked Darin Fisher <darin@meer.net> for
superreview:
Bug 87513: about:<randomness> doesn't display a default page, if the about:
topic doesn't exist.
https://bugzilla.mozilla.org/show_bug.cgi?id=87513

Attachment 195365: Simple fix
https://bugzilla.mozilla.org/attachment.cgi?id=195365&action=edit