HTML sidebar with XPInstall?

[email protected] (Victor Porton)
Newsgroups gmane.comp.mozilla.devel.xpinstall
Organization Golden Telecom
Message-ID <[email protected]> 
I want to make a HTML + Javascript sidebar (better without XUL as I
don't yet know XUL). The problem is that it needs access privilegies to
document's content. So just simple adding sidebar doesn't work.

Can it (a HTML sidebar) be installed with XPInstall without XUL?
If yes, could you explain how? (How to add sidebar from install.js?)

Please answer guys, *every* of you will benefit if I will be able to
make this useful sidebar.
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