[Wubdidu]

Huh? I'm still running my own sync server and it was really easy to setup.

https://docs.services.mozilla.com/howtos/run-sync-1.5.html

Working fine with Firefox on macOS and Android. You can even setup the authentication server, but I didn't see why I'd need that. Having the data on my own server is enough for me.

[Yetanfou]

It is still possible to hack 'old' sync accounts into nightly builds but this will soon disappear as well. The Android version does not support 'old' sync accounts any more.

[Wubdidu]

I'm confused… I assume "'new' sync" means Sync-1.5 in your context, right? Where is the issue with using Sync-1.5? It works completely fine for me.