I actually use both in fish. I use aliases for some longer commands. For example I have la as an alias for eza -la --icons=auto --group-directories-first because I don’t really want to see it every time I run la. I use abbreviations for some shorter commands. For example systemctl abbreviated to sys and systemctl --user abbreviated to sysu.

I use Firefox as my main browser. I use the multi-account containers extension in Firefox to seperate my browsing activities. Brave is installed as a backup in case firefox fails me. I use TOR browser for searching for stuff that I don’t want linked to me.

Silent Hill

You could also use a tempmail for the email https://adguard.com/en/adguard-temp-mail/overview.html

BTW do u know what the difference between the two PDFs they offer is?