Also, Linux does not auto-update itself, and that’s bad mostly when looking at the programs (like the web browser) that did that automatically, and here it can’t anymore.
I understand that most users don’t update their system and the utils they downloaded, but that’s essential for a web browser.
I was considering that I should just install Firefox as the fatpak for everyone, instead of the core package manager, for this and other reasons, but my users have so little memory in their old machines that it’s already barely necessary.