Consti

This would likely only hurt the end user. Many use chromium-based browsers, so you’re just driving those away.

You can detect Firefox, so you can do a superficial block in JS, but lemmy is such a simple site that you’d find it hard to find areas where there’s actual differences between the browsers, those usually only come from complex pages like video calling

Immutable distros aren’t immutable in the home folder though, they would be unusable otherwise, so that doesn’t solve OPs problem of dotfiles/personal files (I know nixOS tries to get rid of dotfiles, but in my experience that almost never works, it’s only helpful for replacing config files in /etc)

Same logo as on the left picture (bottom right corner) but rotated to align with the finger

You can set the initial value directly in /etc/environment, did you check that? It could also be set only for your user, so it might be in ~/.profile, ~/.bashrc or ~/.bash_profile` (or the rc file for your shell if you’re not using the default bash).

Edit: I suppose you could also have added a startup script in /etc/init/ or /etc/init.d/, or in /etc/rc.local