Вот такой вот странный косяк: http://img124.imageshack.us/img124/4043/xulbug.png
Для Ъ - у окна есть только рамка и кнопки prefpane. Остальное не отображается. prefpane'ы не переключаются.
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="chrome://sticker-toolbar/skin/sticker-preferences.css" type="text/css"?>
<prefwindow id="StickerPreferences" title="Stickers Preferences" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<prefpane id="pane1" label="General">
<preferences>
<preference id="sticker_auth_email" name="sticker.email" type="string"/>
<preference id="sticker_auth_passwd" name="sticker.passwd" type="string"/>
</preferences>
<hbox>
<label control="symbol" value="E-mail: " />
<textbox preference="sticker_auth_email" id="email" />
</hbox>
<hbox>
<label control="symbol" value="Password: " />
<textbox preference="sticker_auth_passwd" id="passwd" />
</hbox>
</prefpane>
<prefpane id="pane1" label="Filters">
<preferences>
<preference id="sticker_filter_friends" name="sticker.filter_friends" type="string"/>
</preferences>
<hbox>
<label control="symbol" value="Friends: " />
<textbox preference="sticker_filter_friends" id="filter_friends" />
</hbox>
</prefpane>
</prefwindow>