said by neill:There's an app called MozBackup that you might want to refer to in refining this. The developer has discontinued support, but it works fine with current versions of FF and TB.
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home.zcu.cz/~pcvrcek/ It perhaps worked fine if one were using standard default locations for the profile etc. But if one did an installation say with Thunderbird and installed your mail folders in a non-standard place (say a different partition) and thereafter decided to back this up it would very often make a mess of it.
I worked around this but essentially it was an application I could not truly trust.
Peter