Is anyone using a firefox XUL IDE?

I'm not interested in Firebug, a XUL debugger, or a JavaScript editor, but a true WYSIWYG IDE for XUL form design.

Solution

Here is a MozillaWiki page with a list XUL Integrated Development Environments and descriptions of each.

Why can't I put an HSTS header on a meta tag?
Export all http requests on a specific page to txt/csv
How to make browser request smaller range with 206 Partial Content
How to prevent content being displayed from Back-Forward cache in Firefox?
How can I inspect page resources in Firefox?
Building firefox error: c compiler cannot create executables
Firefox dev tools toolbar splits into columns - I want it to stay as rows
Where does Firefox save currently open tabs on disk
How to get through security error pages in the Firefox web browser?
"This addon could not be installed because it appears to be corrupt" Firefox Developer Edition
Prevent line/paragraph breaks in contentEditable
Issue with document.requestStorageAccess on Firefox
localStorage is not working on google chrome
C# get URL from Firefox but don't use DDE
showSaveFilePicker not in Firefox - what can I use instead?
Is there a way to show alt="text" as a mouseover tooltip in firefox like IE does automatically?
How to send messages to Firefox through devtools protocol?
Bulk edit Firefox bookmarks
Table order messed in Firefox, but works fine in other web browsers
Does modern Firefox have a context menu "This Frame"> "Inspect element"?
Firefox pdf download using html2pdf.js causing text overlapping issue
Why copy function is not working inside setTimeout?
Save base64 string as PDF at client side with JavaScript
How to remove 3D border of input filed in Chrome
GitHub profile picture upload not working
Content security policy blocking injecting browser extension styles into pages in firefox
Amazon S3 CORS (Cross-Origin Resource Sharing) and Firefox cross-domain font loading
How do I add a custom search engine to Firefox desktop?
Detect all Firefox versions in JS
How to manually send HTTP POST requests from Firefox or Chrome browser