How to add extra property to window object

[David Huynh]

Hi all,

I'm trying to write a Firefox extension that adds an extra property to 
the window object that Web pages' scripts have access to. As you know, 
currently, scripts in Web pages can access such objects as


window
window.document
window.navigator
window.netscape
...

I'd like to add my own property onto this window object that all Web 
pages' scripts can access


window.foo

I will provide the implementation of foo as necessary. I'm hoping that 
someone here can tell me how to do this. I've tried a number of methods 
(such as overloading the browser XBL binding), but I don't see how to 
do this cleanly from within an extension.


(The major issue is probably security, hence, my posting here.)

Many thanks in advance!

David
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PropertyPermission denied

[David Huynh]

Hi, if my javascript generates the following exception:
	java.security.AccessControlException: access denied 
(java.util.PropertyPermission java.io.tmpdir read)

which privilege should I ask for? I've already tried:
netscape.security.PrivilegeManager.enablePrivilege(UniversalXPConnect 
UniversalFileRead UniversalBrowserWrite UniversalBrowserRead 
CapabilityPreferencesAccess);

My script is calling the Jena JAR to create an file-based RDF model in 
the directory C:\MyData.

Thanks.
David
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