[Bug 2046844] Re: AppArmor user namespace creation restrictions cause many applications to crash with SIGTRAP

[John Johansen]

We have an update of the firefox profile coming that supports the
/opt/firefox/firefox location used as the default install for the
firefox downloaded directly from mozilla.org

If you are running firefox out of your home directory, that will not be
directly supported and you will need to chose to do one of the following
to fix the issue.

1. The recommended way is updating the firefox profile in
/etc/apparmor.d/firefox by adding the location you have firefox
installed, and then reloading the profile with sudo apparmor_parser -r
/etc/apparmor.d/firefox.

2. You can disable user namespaces, this will keep firefox from trying
to use them as part of ts sandbox https://lwn.net/Articles/673597/

3. the least recommended way to fix this is you can disable the finer
grained user namespace restrictions as outlined in
https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged-user-
namespaces

** Changed in: qmapshack (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: qutebrowser (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: rssguard (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: supercollider (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: geary (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: goldendict-webengine (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: kchmviewer (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: loupe (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: notepadqq (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: pageedit (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/2046844

Title:
  AppArmor user namespace creation restrictions cause many applications
  to crash with SIGTRAP

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