The Bookmarks bar on other computers not syncing with this computer bookmarks toolbar

Does it help to use "Sync now" on both computers? If not, is the problem that one of the computers has fallen behind on recent changes, or are the toolbar bookmarks completely missing?

If you check the other folders - for example using the Bookmarks Sidebar (Ctrl+B), are the Bookmarks Menu and Other Bookmarks syncing?

I have tried to delete "Folder A/Bookmark A" from my firefox toolbar on Computer 1, then sync now. I then tried to delete "Folder A/Bookmark B" from my firefox toolbar on Device 2, then sync now.

I tried various combinations of this ... deleting entire folders from Menu and Toolbar folders on each device and then Sync Now.

It is nearly impossible to get a "delete" to sync across devices. Instead, sync now ends up pushing those deleted items back to the device from which I deleted them.

This is really unexpected - unable to sync "deletes" across devices.