scuttle-firefox/chrome/scuttle/content/scuttle.xul

<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://scuttle/skin/scuttle.css"?>
<!DOCTYPE overlay SYSTEM "chrome://scuttle/locale/scuttle.dtd">

<overlay xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
    id="scuttle-overlay"
    centerWindowOnScreen="true">
    <script type="application/x-javascript" src="chrome://scuttle/content/scuttle.js"/>
    <toolbarpalette id="BrowserToolbarPalette">
        <toolbarbutton id="scuttle-button-my"
            class="toolbarbutton-1 chromeclass-toolbar-additional"
            label="&scuttle.button.my;"
            tooltiptext="&scuttle.button.my;"
            onclick="scuttle_my(event, true);"
            oncommand="scuttle_my(event);"/>
        <toolbarbutton id="scuttle-button-add"
            class="toolbarbutton-1 chromeclass-toolbar-additional"
            label="&scuttle.button.add;"
            tooltiptext="&scuttle.button.add;"
            oncommand="scuttle_add();"/>
        <toolbarbutton id="scuttle-button-multiadd"
            class="toolbarbutton-1 chromeclass-toolbar-additional"
            label="&scuttle.button.multiadd;"
            tooltiptext="&scuttle.button.multiadd;"
            oncommand="scuttle_multiadd();"/>
    </toolbarpalette>
    <popup id="contentAreaContextMenu" onpopupshown="scuttle_menu()">
        <menuitem id="scuttle-context-page"
            insertafter="context-bookmarkpage"
            class="menuitem-iconic"
            label="&scuttle.button.add;"
            image="chrome://scuttle/skin/scuttle-icon-small.png"
            accesskey="c"
            hidden="true"
            oncommand="scuttle_add();"/>
        <menuitem id="scuttle-context-link"
            insertafter="context-bookmarklink"
            class="menuitem-iconic"
            label="&scuttle.context.link;"
            image="chrome://scuttle/skin/scuttle-icon-small.png"
            accesskey="c"
            hidden="true"
            oncommand="scuttle_add(typeof(gContextMenu.linkURL) == 'string' ? gContextMenu.linkURL : gContextMenu.linkURL(), gContextMenu.linkText());"/>
        <menuitem id="scuttle-context-selection"
            insertafter="context-searchselect"
            class="menuitem-iconic"
            label="&scuttle.button.add;"
            image="chrome://scuttle/skin/scuttle-icon-small.png"
            accesskey="c"
            hidden="true"
            oncommand="scuttle_add();"/>
    </popup>
</overlay>