It depends on the type of blocking you want. Firefox + ublock origin is an easy way but mostly for adverts. Or if you want a bit more hardcore without root install blokada from http://blokada.org You'll have to "allow external APK sources" though from device settings, as it is not in the Play store. It routes your traffic through a local VPN, so works in all applications, and has black and white listing of hosts. By default it uses a blacklist that blocks advertising hosts.
