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Use EverSync addon. It can sync your speed dial tiles and bookmarks.

Try to create a new Firefox profile and see if speed dial will work.

Can you backup with EverSync and try ti reinstall FVD Speed Dial?

What the version of your FF and OS?

Hello

Can you send me screenshot of current screen?

Hello

But you can use EverSyc for Opera - https://addons.opera.com/en/extensions/details/eversync-sync-dials-backup-dials/?display=en

Thanks

Hmm, most likely preferences didn't save. How did you close your browser?

Do you have Firefox or Firefox-based browser? Please tell me version and your OS.

Hello

I need more details? Can't install FVD Speed Dial?

Hello

Yes, but some later.

Thanks