Mozilla browser "about:" exploit

[Siamesecat]

Here is a crash exploit which works on Mozilla browsers:
http://maas-online.nl/security/poc-mozilla-crash.html

The crash actually occurs when the browser tries to print an iframe, but I think that allowing the use of about: <string> is inadvisable when it comes from web pages.
I wrote a filter to stop it. If anybody has any suggestion for improvement, I'd welcome it. For example, can other tags be used for such a thing, and is "src=" the only way in which something like that could be set up?

Code:

Name = "About: * Exploit (Mozilla)"
Active = TRUE
Bounds = "<(a|img|image|iframe|input|script)*></(a|img|image|iframe|input|script|br)>"
Limit = 250
Match = "*src=$AV(about:\1)*"
Replace = "Exploit: about:\1"