rem: row.setAttribute("image", uri.prePath + "/favicon.ico");  
add: if (/^https?/.test(uri.scheme)) row.setAttribute("image", uri.prePath + "/favicon.ico");  
context:   _initFeedReaders: function() {    this.updateSelectedApplicationInfo();    var readersList = this.element("readers");    // List the system default feed reader if it is    // not the last-selected application already    try {      var systemDefaultReader = Cc["@mozilla.org/browser/shell-service;1"].                                getService(Ci.nsIShellService).                                defaultFeedReader;      var defaultSystemReaderFilefield = this.element("defaultSystemReaderFilefield");      defaultSystemReaderFilefield.file = systemDefaultReader;      var selectedAppFile = this.element("selectedAppFilefield").file;      if (!selectedAppFile || defaultSystemReaderFilefield.file.path !=          selectedAppFile.path) {        var defaultReaderItem = document.createElementNS(kXULNS, "listitem");        defaultReaderItem.id = "defaultSystemReaderListitem";        defaultReaderItem.className = "listitem-iconic";        defaultReaderItem.setAttribute("label", defaultSystemReaderFilefield.label);        defaultReaderItem.setAttribute("image", defaultSystemReaderFilefield.image);        readersList.appendChild(defaultReaderItem);      }    }    catch(ex) { /* no default reader */ }    // List of web handlers    var wccr =         Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].        getService(Ci.nsIWebContentConverterService);    var handlers = wccr.getContentHandlers(TYPE_MAYBE_FEED, {});    if (handlers.length == 0)      return;    var ios =         Cc["@mozilla.org/network/io-service;1"].        getService(Ci.nsIIOService);    for (var i = 0; i < handlers.length; ++i) {      var row = document.createElementNS(kXULNS, "listitem");      row.className = "listitem-iconic";      row.setAttribute("label", handlers[i].name);      row.setAttribute("webhandlerurl", handlers[i].uri);      var uri = ios.newURI(handlers[i].uri, null, null);      row.setAttribute("image", uri.prePath + "/favicon.ico");            readersList.appendChild(row);    }  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/b7af671544d993ec1de4340f46e510f9bd63fbfc/feeds.js/clean/browser/components/preferences/feeds.js