An additional item regarding changing `default_ccache_name`: As far as I
understand, this is an MIT Kerberos parameter set in krb5.conf.

However, I'm using Kerberos (in combination with LDAP) via SSSD (and I
think using SSSD is pretty common). I don't remember what default config
Ubuntu ships with SSSD, but maybe the default path has to be changed
there, too (parameters `krb5_ccachedir` and `krb5_ccname_template`).

This might also apply to other Kerberos libraries besides MIT Kerberos
and SSSD (if there are any, I don't know).

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https://bugs.launchpad.net/bugs/1849346

Title:
  [snap] kerberos GSSAPI no longer works after deb->snap transition

Status in Mozilla Firefox:
  New
Status in snapd:
  New
Status in chromium-browser package in Ubuntu:
  In Progress
Status in firefox package in Ubuntu:
  In Progress

Bug description:
  Workaround
  ----------

  Execute

    echo 'default_ccache_name = FILE:/home/%{username}/krb5cc' >>
  /etc/krb5.conf

  so that the Kerberos credentials are stored in a file path a snapped
  application can read.

  Acknowledgement: For many that can't work for {different reasons}, as
  stated in multiple comments below. Nonetheless it is worth a mention.

  Original report
  ---------------

  I configure AuthServerWhitelist as documented:

  https://www.chromium.org/developers/design-documents/http-
  authentication

  and can see my whitelisted domains in chrome://policy/

  but websites that used to work with SPNEGO/GSSAPI/kerberos no longer
  work. I'm guessing the snap needs some sort of permission to use the
  kerberos ticket cache (or the plumbing to do so doesn't exist...).

  I can confirm that Chrome has the desired behavior.

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