How to inspect a Firefox WebExtension popup?
<p>I'm trying to get a Google Chrome Extension to run as a Firefox Webextension. My original Problem is that the popup has no height. Besides that I could not for the life of me figure out how to inspect the DOM of the popup.</p>

<p>Btw the popup is just an HTML file and it is defined in <code>browser_action.default_popup</code>.</p>