Sufficiently secured systems that don't allow certain read/writes in /home have the issue where Firefox can't tell if it's the default browser, so even if it is

Sufficiently secured systems that don't allow certain read/writes in /home have the issue where Firefox can't tell if it's the default browser, so even if it is default it will continue prompting forever. I had that issue on a few Linux systems, and the default config on OpenBSD (specifically the 'unveil' setup for firefox). It's not a good user experience, even for people who are used to things not working perfectly.