The request is similar to https://forum.snapcraft.io/t/auto-connecting-the-system-files-interface-for-the-firefox-snap but for thunderbird
Thunderbird allows sysadmins to define enterprise policies to customize the browsing experience. These policies are stored in /etc/thunderbird/policies/
on the host filesystem, which is typically not readable by a strictly confined snap.
A plug is going to be added to thunderbird
plugs:
etc-thunderbird-policies:
interface: system-files
read: [/etc/thunderbird/policies]
This is a request for the corresponding store declaration to auto-connect the interface.
Thanks for considering it!