Rated 4 out of 5 stars

I copy the entire Thunderbird directory. Are the colors stored in the registry?

This review is for a previous version of the add-on (1.0).  This user has a previous review of this add-on.

Colors are stored in .msf files.
Thunderbird portable might overwrite .msf files when it detected mbox files updated. Let me look at that when I have time in a few weeks time.