ABE and Facebook Chat

[nkhaine]

Hi,

I've been using the facebook ABE rules as defined in the NoScirpt FAQ to firewall facebook activities to within its own domain. However after applying this rule the facebook chat appears to break after a period of time.

Steps to Reproduce

1) Visit Faceboook

2) Wait for a period of time (~5 minutes)

3) Recieve following notification'

[ABE] <.facebook.com .fbcdn.net> Deny INCLUSION(SCRIPT, OBJ, SUBDOC) on {GET http://0.36.channel.facebook.com/iframe ... rXLXn6D.js <<< about:blank, about:blank - 7}
USER rule:
Site .facebook.com .fbcdn.net
Accept from .facebook.com .fbcdn.net
Deny INCLUSION(SCRIPT, OBJ, SUBDOC)

4) Facebook chat has errored


Any help would be greatly appreciated

[Giorgio Maone]

It's a known Firefox 4 beta bug.
As a work-around, add "about:blank" to the list of permitted origins.