Running JS code in extension's window from XPCOM

[Ondřej Doněk]

Hello,
I want to ask if there is something special about accessing JS code in Firefox's extension from the XPCOM component (also written in JS).

I working on custom mime-type-handler and what I want is
1) open tab with my extension when handler is started
2) pass some data when parser is stopped

While at 1) I have no problem I can not pass 2). I'm using this code (which I tested in Scratchpad and there works well but in my component not):

function executeCsvViewerTab()
{
var url = "chrome://csvviewer/content/csvtab.xul",
wm = Components.classes["@mozilla.org/appshell/window-mediator;1"].
getService(Components.interfaces.nsIWindowMediator);
var e = wm.getEnumerator("navigator:browser");
while(e.hasMoreElements()){
var tb = e.getNext().gBrowser;
for(var i=0; i<tb.browsers.length; i++) {
var cb = tb.getBrowserAtIndex(i);
if(url == cb.currentURI.spec){
var csvviewerTab = tb.tabContainer.childNodes[i];
if(csvviewerTab){
var win = tb.getBrowserForTab(csvviewerTab).contentWindow;
with(win){
CV_TabController.openCsvFromMimeHandler("...");
}
}
}
}
}
}

Thanks for any answers.

Regards,
Ondrej Donek