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Personal "top sites" in firefox 65.0 64-bit disappeared windows 10 pro way to backup - save my top Sites??

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Personal "top sites" in firefox 65.0 64-bit all disappeared - windows 10 pro 64-bit - is there a way to backup - save my top Sites?? Just recently upgraded to CCleaner Pro Trial.

Personal "top sites" in firefox 65.0 64-bit all disappeared - windows 10 pro 64-bit - is there a way to backup - save my top Sites?? Just recently upgraded to CCleaner Pro Trial.

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CCleaner is known to cause problems such as that; i.e., data loss.

Don't use CCleaner on Firefox, disable Firefox in CCleaner preferences.

Firefox does not save an automatic backup of that type of data; only bookmarks backups are saved automatically.