It looks like this... / #5451

I played a bit and this is my first result

from js/listFunctions.js

    $('table.list a').click(function(e) {
        if( e.ctrlKey )
        {
        	document.location.href = gBrowser.addTab(this.href);
        	return false;
        }
        else 
        {
            document.location.href= this.href;
            return false;
        }
    });