Much as i despise HTML UIs (see reasoning my rant below <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10655606" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10655606</a>), it is relevant and XUL is horrible.<p>I&#x27;m glad to see it disappear, it&#x27;s one of those things the world doesn&#x27;t need. A failed experiment. And an HTML UI for firefox makes sense in the long run.<p>Fun fact of the day: Did you know XUL uses DTD to store translations? That&#x27;s right, if you have a string you want to translate, you <i>just</i> have to create a new XML element in a localized DTD file. Isn&#x27;t that just a wonderful idea.