var win = Services.wm.getMostRecentWindow("Places:Organizer");
if (!win) {
    openDialog("chrome://browser/content/places/places.xul", "",
        "chrome,toolbar=yes,dialog=no,resizable", "AllBookmarks");
    return;
}
win.focus();

const pn = " SomePrefNane.folderURI";
var prefs = Application.prefs;
if (!prefs.has(pn)) prefs.setValue(pn, "");
var pref = prefs.get(pn);

const url = "chrome://browser/content/places/places.xul";
var observer = {

    observe: function(win) {
        win.addEventListener("load", this, false);
    },
    handleEvent: function(e) {

        var doc = e.target;
        var win = doc.defaultView;
        
        if (e.type == "unload") {
            pref.value = win.PlacesOrganizer.location;
            return;
        }
        win.removeEventListener("load", this, false);
        if (doc.location.href != url) return;
        win.addEventListener("unload", this, false);
        setTimeout(function() {
            if (pref.value) win.PlacesOrganizer.location = pref.value;
            win.PlacesOrganizer._places.focus();
        }, 100);
    }
}
Services.obs.addObserver(observer, "domwindowopened", false);

this.onDestroy = function(reason) {
    try {
        Services.obs.removeObserver(observer, "domwindowopened");
    } catch (ex) {}
    if (reason == "delete") pref.reset();
}

const pn = " SomePrefName.folderURI";
var prefs = Application.prefs;
if (!prefs.has(pn)) prefs.setValue(pn, "");
var pref = prefs.get(pn);

const url = "chrome://browser/content/places/places.xul";
const command = "PlacesCommandHook.showPlacesOrganizer('AllBookmarks');"

function openInTab(e) {

    if (e.target.getAttribute("oncommand") != command) return;
    e.stopPropagation();

    for (var tab = gBrowser.tabs[0]; tab; tab = tab.nextSibling) {
        var loc = tab.linkedBrowser.contentDocument.location;
        if (loc == url) {
            var tvti = tab._tabViewTabItem;
            if (tvti && tvti.parent != TabView._window.GroupItems._activeGroupItem)
                TabView.moveTabTo(tab, TabView._window.GroupItems._activeGroupItem.id);
            gBrowser.selectedTab = tab;
            return;
        }
    }
    gBrowser.loadOneTab(url, null, null, null, false, false);
}
function onDCL(e) {

    var win = e.target.defaultView;
    if (win.location != url) return;

    setTimeout(function() {
        if (pref.value) win.PlacesOrganizer.location = pref.value;
        win.PlacesOrganizer._places.focus();
    }, 100);

    win.addEventListener("unload", function onUnload(e) {
        win.removeEventListener("unload", onUnload, false);
        pref.value = win.PlacesOrganizer.location;
    }, false);
}
addEventListener("click", openInTab, true, window);
addEventListener("command", openInTab, true, window);
addEventListener("DOMContentLoaded", onDCL, false, gBrowser);

this.onDestroy = function(reason) {
    if (reason == "delete") pref.reset();
};

var bookmarksService = Cc["@mozilla.org/browser/nav-bookmarks-service;1"].getService(Ci.nsINavBookmarksService);
var historyService = Cc["@mozilla.org/browser/nav-history-service;1"].getService(Ci.nsINavHistoryService);

var options = historyService.getNewQueryOptions();
var query = historyService.getNewQuery();

var str = "";
var count = 0;
function test(folderId) {

    query.setFolders([folderId], 1);
    var folder = historyService.executeQuery(query, options).root;

    folder.containerOpen = true;
    for (var i = 0; i < folder.childCount; i ++) {

        var child = folder.getChild(i);
        if (child.type != child.RESULT_TYPE_FOLDER) continue;

        var title = child.title || "(без заголовка)";
        str += "[" + child.itemId + "]  " + title + "\n";
        count++;
        test(child.itemId);
    }
    folder.containerOpen = false;
}
test(bookmarksService.placesRoot);

alert(count);
alert(str);

var folderId = 2;

var navBookmarksService = Cc["@mozilla.org/browser/nav-bookmarks-service;1"].getService(Ci.nsINavBookmarksService);
var title = navBookmarksService.getItemTitle(folderId);
alert(title);