Clone / duplicate profile

Description of the issue:
Clone or duplicate a profile.
Being able to duplicate any existing profile with all (or partial) settings, plugins, bookmarks, etc.

Expected result:
Having a new separate profile with same (or partial) settings, plugins, bookmarks, etc.

Additional Information:
Why isn’t this already possible? Is there a technical issue?

It is possible with tricks like copy/paste and rename profile folders, but that’s a complete hack and should be possible by one click in the add new profile menu.