[ido]

I believe in most EU countries that implement such protection companies can still fire people, they just need to continue paying them for some minimum amount of time.

E.g. in Germany a company has to give at least 4 weeks notice & that time (slowly) increases the longer the employee has been at the company[0]. In practice it often means they are asked not to show up and still get paid for the remainder of their notice period.

Assuming you probably have some unused vacation days if you were fired without warning it's likely you're basically guaranteed an equivalent to a couple months' severance. Generous - but far from "un-fireable".

[0] look at the 2nd table under https://www.finanztip.de/arbeitsrecht-kuendigungsfrist/#c776... "Monate" means months & "Jahre" means years, so e.g. someone with 20 years tenure gets a minimum 7-months notice.