Make new folder sort order permanent (even after uninstall of MSF AddOn)?

[pstein]

As far as I can see Thunderbird adds newly created folders at the end (!) of its already existing brothers.
I guess the default sort order is by folder creation date/timestamp and NOT alphabetically

Now with MSF AddOn I can re-arrange the folder sort order.

Is there a way to tell MSF to make this sort order permanent (even after uninstall the AddOn)?

This could be achieved by assigning a new (faked) creation date to the folder so that it fits between existing folders.

Or alternative modify the manual sort order of the children folders in the parent folder meta data/header?

Can this be added to the MSF WebExtension?

Thank you

[itagagaki]

Thunderbird adds newly created folders at the end (!) of its already existing brothers.

It's not what I see. Which version is it?