Which is better to install alsa or pulseaudio?

Question

linux

At first I wanted to put alsa , but then I noticed that firefox uses pulseaudio in its dependencies , and then this question arose in front of me, if I don’t put pulseaudio and put alsa in firefox , there will be no sound?
Assembly documentation in which I found a dependency in the USE system flags

Answer 1

Something like this

Answer 2

The pulse is like a saddle for a cow. Completely useless and ridiculous.