Fix firefox bug in Ubuntu22

Problem

When excute ./firefox in a shell in Ubuntu22, it gives an error message: cannot create user data directory: /home/company_name/user_name/snap/firefox/1635: Permission denied.

Reason

According to the web search results, this is a common issue when the home directory is not in the standard /home location, or is a symlink to another mount point.

We use domain with user_name, so our path home is not /home, instead /home/company_name/ .

Fix

editing /etc/apparmor.d/tunables/home.d/ubuntu with that line:

@{HOMEDIRS}+=/home/company_name/

After save, just restart some services:

systemctl restart apparmor.service snapd.apparmor.service snapd.service snapd.socket

Related

This method may also be apply to other softwares installed by snap.