Import Safari data into Safari Technology Preview I have installed the Safari Technology Preview and whilst everything works fine, there is a lot of data which is missing and not been migrated.

Bookmarks, Reading List and AutoFill have been transferred automatically through iCloud, and eventually History through iCloud too, but I would like to also transfer the following data:


Cookies
Preferences
Extensions (specifically the extension preferences — I can reinstall the actual extensions)


How can I export my Safari browser data into the Safari Technology Preview?
Coping ~/Library/Safari to ~/Library/SafariTechnologyPreview works for me.
On the command line, run:
cp -R ~/Library/Safari ~/Library/SafariTechnologyPreview