With Chrome

On the audio element simply click the 3 dots and click download

Safari

First click play on the podcast that you want to download. Then right mouse click on the play icon and select "Download audio".
(sometimes it might say "download video" then select that it will download an audio file)

Podcast downloader

Blood is Thicker: The Hargan Family Killings

By: CBS News

Genre: True Crime

The Joe Rogan Experience

By: Joe Rogan

Genre: Comedy

Acquired

By: Ben Gilbert and David Rosenthal

Genre: Technology

The Daily

By: The New York Times

Genre: News

Dateline NBC

By: NBC News

Genre: True Crime

CounterClock

By: audiochuck

Genre: True Crime

Crime Junkie

By: audiochuck

Genre: True Crime

White Devil

By: Campside Media

Genre: True Crime

Morbid

By: Morbid Network | Wondery

Genre: True Crime

SmartLess

By: Jason Bateman, Sean Hayes, Will Arnett

Genre: Comedy