Thunderbird protocol handler

In some cases Thunderbird won't open a hyperlink in an email. This can be solved by the following steps:

  • Open Thunderbird
  • Go to: Edit > Preferences > Advanced
  • Click on the button Config Editor

Now some entries needs to be filtered:

  • In the Filter field type: network.protocol-handler.warn-

Five preference names will be visible:

  • network.protocol.handler.warn-external-default
  • network.protocol.handler.warn-external.file
  • network.protocol.handler.warn-external.ftp
  • network.protocol.handler.warn-external.http
  • network.protocol.handler.warn-external.https

The following entries needs to be set from false to true:

  • network.protocol-handler.warn-external.http
  • network.protocol-handler.warn-external.https
  • network.protocol-handler.warn-external.ftp

The next time when receiving an email with an hyperlink, the correct (external) program will be started.