Although Chrome doesn't have a built-in option to block websites, there are a few ways to eliminate distractions.

If you want to block the Roblox website or app, or prevent Roblox from being downloaded on your Windows 11/10 computer, see this post.

Block websites on Windows or macOS Editing the Hosts file can block websites. If you want to dig deep into the settings for your computer, both Windows and macOS have what’s called a Hosts file.