[Users] Viewer?

[Ralf Mardorf]

On Sat, 10 Dec 2016 12:53:39 +0100, Erik P. Olsen wrote:
>When I receive an e-mail with a link to some webpage nothing happens
>when I click on it wit the left mouse button. The right button reveals
>a choice between "Open in a viewer" and "Open in a browser". What is
>this viewer which apparently does nothing?

Configuration > Preferences... > Message View > External Programs >
  [ ] Use system defaults when possible
  Web browser    firefox '%s'

Uncheck "Use system defaults when possible" and choose "firefox" or any
other browser, just keep the "'%s'".

Regards,
Ralf