I wouldn't recommend deleting all cookies all the time. While true, it does make more private, but relogin into all the sites all the time is a pain.

While while listing is good, I'd recommend a separate "burner" profile that essentially reset itself on closure, with all the privacy options activated. Then, you can have a second profile you can use when you need to be logged in.

I literally have librewolf open on profile switching so I can easily have my reinforced profile ready to go.