Comment 14 for bug 1774121

Created attachment 9218969
For comparison: Win10: Choose Folder dialog with [Select Folder] button on 78.10.0

For comparison: TB's folder picker dialog for saving multiple messages on Win10/TB 78.10.0 is better (but also not ideal, e.g. no hint for saving):

Dialog titled "Choose Folder" (that looks set by TB, as it's non-localized), button labelled "Ordner auswählen" (German for "Select/choose Folder", so that's probably Win10-dialog-inbuilt).