Selectively disable javascript function.

[John Smith]

Is it possible to disable a specific javacript function using Firefoxes
security policies (user.js, prefs.js)

For example is it possible to disable the javascript object function Date()
from being accessed .

ie:
user_pref("capability.policy.policynames", "killfunction");
user_pref("capability.policy.default.javascript.date", "noAccess");
user_pref("capability.policy.killfunction.sites", http://evilsite.org);

From what I read here it seems like this is possible, tho I'm not sure if
they are just referring to disabling certain elements of the DOM.
http://kb.mozillazine.org/Security_Policies#Prevent_any_JavaScript_function.2Fmember_from_being_run.2Fread.2Fset

[Craig Arnet]

Do any of the developers have an answer to this? Is it possible to disable
the use of a specific Javascript function rather disabling Javascript
entirely.

"John Smith" <n...@na.com> wrote in message
news:h4WdncIGLZV9DPXb...@mozilla.org...