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How to sync speeddial on FF 53?

5phcib il y a 6 ans 0

How do I sync speeddial on FF 53?
I also use old speeddial 23
Both work fine and I don't want to upgrade, just want to sync
Maybe I can install some old eversync, for that? 
Dont need any new features, just want to sync and keep what I have now. Old, outdated, etc. versions are fine.
Any options?