Javascript running "under XUL" and add-on owner

Yves Dolce <[email protected]>
Newsgroups gmane.comp.mozilla.devel.xpfe
Organization http://groups.google.com
Message-ID <[email protected]> 
Hello everyone,

Two quick questions from a XUL newbie:
1. In Javascript, how can I detect I'm running in the context of XUL and not a plain Web page?
2. How can I know the name of the add-on who lead the call to my function? The add-on that I would find if I'd look at the call-stack.

Thanks a lot!
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