From the context menu (right click), you can "View source" "View selection" or "Edit text" with your favorite editor.
Requires off-site host that I won't bother with
Very handy but the installation is not for noobs.
omeriko9
https://www.bennee.com
Mads Cordes
Ruslan Osmanov
https://mikulabeutl.com
Wayne Davison
https://lethalware.co.uk
fregante
https://upway2late.com
https://www.zenoven.com
https://asamuzak.jp
Stephen Blott