Firefox for iOS Community Forum

Two devices - MacBook Air and an iPhone. Both run the latest Firefox application, respectively. Starting with both applications having the bookmarks synchronised. Next, the bookmarks on one of the devices, say the laptop, are changed - some deleted, new added, overall bookmarks folders edited.

Question: How is it possible to ensure that Firefox synchronisation will transfer the latest compilation of bookmarks, as edited on the laptop, to the mobile phone application and not the other way round, undesireably restoring the preceding compilation, instead?

I use Firefox both on macOS and iOS. I have tried removing the application entirely from iOS, and yet old passwords are still appearing on iOS which I've deleted on desktop. I cannot for the life of me figure out why this would be an issue. I have disconnected syncs, signed out and back in, completely uninstalled the app.