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Editorial Team
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Asked: 2026-05-24T00:02:15+00:00

From a Firefox extension is there a way to get the XUL iframe/browser that

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From a Firefox extension is there a way to get the XUL iframe/browser that contains a content HTML window. Note I am not asking how to get the current browser (gBrowser) or the browser.xul window. I have target/content HTML window handle, I want to follow it up in the XUL tree (to the XUL element that contains it).

getting-a-reference-to-the-parent-iframe suggest that for HTML iframes you need to iterate through all iframes to find the right one, but I am wondering if there is some Firefox-specific way of accessing a containing XUL iframe (from privileged/extension code).

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  1. Editorial Team
    aWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
       .getInterface(Components.interfaces.nsIWebNavigation)
       .QueryInterface(Components.interfaces.nsIDocShell)
       .chromeEventHandler

    Note that in Firefox 3.6 and previously this returns an XPCNativeWrapper which you then probably want to unwrap.

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