Diễn đàn hỗ trợ Firefox

I have Mac, Windows, and Linux boxes. All show connected to Firefox Sync, however, bookmarks etc are only actually in sync between Windows and Linux. I've tried logging out on all devices, resetting passwords, reinstalling FF on the Mac. Can't seem to get it to work.

Why you create Mozilla account with sync, if I can't use profile which I saved on my old PC. I change my PC and now I can't use my open tabs as needed, I need to open each tab one by one. Why ??? Why I can't use saved profile on my new PC ??????