Maybe Firefox dropping pwa support is a factor there?

I doubt the actual “feature” is much more than a single line that tells GDAL to translate it from one format to the next, so the real thing here is the convenience of having a webpage that provides this special case as a service. Geojson is easy to read in essentially every language now, so this shouldn’t have been hard to do even before this website.

Here’s my prognosis on how this will turn out…

System: 🚨

Humans: 🤷

Especially not if you ask them if the occupied regions should be returned to Ukraine.