A container for menupopup, panel and tooltip elements. This element is optional; the given elements need not appear in a popupset container.
More information is available in the XUL tutorial.
Examples

<popupset>
<menupopup id="clipmenu">
<menuitem label="Cut"/>
<menuitem label="Copy"/>
<menuitem label="Paste"/>
</menupopup>
</popupset>
<label value="Right click for popup" context="clipmenu"/>
Attributes
Inherited from XUL element |
Properties
| Inherited Properties |