Cargo Features

[dependencies]
publicsuffix2 = { version = "0.5.2", default-features = false, features = ["std", "fetch", "idna", "serde"] }
default = idna, std

These default features are set whenever publicsuffix2 is added without default-features = false somewhere in the dependency tree.

std default fetch?
fetch = std

Enables ureq ^2.9.6

idna default

optional normalization

Enables idna

serde

optional for fixtures/tests only

Enables serde and serde_json