What other device are you syncing with? FYI... Firefox Sync IS NOT A DATA BACKUP SERVICE

Sync info... Firefox browser sync https://www.mozilla.org/en-US/firefox/features/sync/ What is Firefox Sync and why would you use it https://hacks.mozilla.org/2018/11/firefox-sync-privacy/ Sync is not a backup tool but it is a good sync/transfer/move tool https://support.mozilla.org/en-US/forums/contributors/707681 https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer https://support.mozilla.org/en-US/kb/how-do-i-choose-what-information-sync-firefox

Firefox is installed on my desktop (Windows 10) and on my cell (Android). I want to synchronize from my desktop to my cell.

Thanks for the update. Are you not able to just log into your account in Firefox on Android. see screenshots

After the above update, I sent this page tab to my phone from my laptop and it appeared on my phone instantly. see screenshot Sync allows you to see and send data between devices. Your screenshot is not in English and it's from software I don't use. What exactly are you waiting for sync to do?

Honestly: I never uploaded any screenshot. This must have happened in the background without my knowledge.