All of these browsers are valid options for privacy-minded people
However they are bad options for those looking to switch from chrome. Even to myself it was very annoying that it always deletes everything, to someone who “already makes life hard on the web” for itself as some like to note in real life.
Mullbad Browser is fine for systems like Tails (not sure if they have it) and maybe for environments like libraries and such public places, where everything is our should be volatile anyway.