Carrousel7956 you can't block Vanadium our browser but as mentioned above there are DNS options to block certain websites as well as by using a VPN with their own blocklists for various categories of content, ads, socials, gambling etc.
As for app store, just don't install either Accrescent or Play Store from the default App Store which is our repository for those and our first party applications, enabling us to update them outside of the OS update process.