Android - Exporting settings in a Firefox-based browser?

https://lemmy.one/post/108350

Android - Exporting settings in a Firefox-based browser? - Lemmy.one

Mull hasn’t been working in the last update so I’m trying to downgrade without losing my settings, but that requires me to delete the app first then reinstall. Is there a way to backup/export my settings?

The only thing that comes to my mind is the sync-option, which is supposed to work with forks as well. But of course you'd need a Mozilla/ Firefox-Account for this. https://support.mozilla.org/en-US/kb/sync-custom-preferences
I was hoping I'd avoid this. Alas, thanks for the help.