Block only selected scripts

[RodTrevizan]

What can I do to block only two scripts in a page?
<SCRIPT LANGUAGE=JavaScript>self.alert('Bla-bla-bla.');self.history.back();</SCRIPT>
They would be:
self.alert and self.history.back

Or where can I find the source code of noscript and edit it
Thanks

[Giorgio Maone]

Use a page-level surrogate script with this replacement code:

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alert = history.back = function() {}

[dhouwn]

Alternatively you could use config policies in this case:
→ http://www.mozilla.org/projects/securit ... olicy.html

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capability.policy.policynames

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constrained

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capability.policy.constrained.sites

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http://www.example.org

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capability.policy.constrained.Window.alert

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noAccess

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capability.policy.constrained.Window.history.back

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noAccess

Not tested though.

[Guest]

Alternatively you could use config policies in this case:
→ http://www.mozilla.org/projects/securit ... olicy.html

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capability.policy.policynames

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constrained

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capability.policy.constrained.sites

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http://www.example.org

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capability.policy.constrained.Window.alert

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noAccess

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capability.policy.constrained.Window.history.back

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noAccess

Not tested though.

Went to about:config created a new string and everything, but when I try to search for this string I created it's like is not there, I want to try it manually but can't find user.js :/
Tried the surrogate thing either and still doesn't work

[Guest]

Nevermind, surrogate worked
I just forgot one "@" in the source thing
Thanks everyone

[Guest]

Any way to block a specific alet window? =D

[dhouwn]

Rewrite the script on the page…