Not sure if you know about this or if there's even anything that can be done, but it looks like the extension won't work if a component is loaded into an iframe. (Both Elements inspector "Sencha Component" and the top-level Sencha tab with the full components list, even after hitting refresh, it only shows the top-level page components, but nothing from within any iframes).
Is there a workaround for this, or is this something you might be able to accommodate?
Thanks,
Brian