Looking for a browser extension to block distracting websites

I get distracted by social media and news sites while working. Current website blockers are either too restrictive (block everything) or too easy to disable. Need something with smart scheduling that understands work hours and can adapt to different types of work sessions.

A browser extension with customizable website blocking, focus mode scheduling, and productivity statistics. Should have different profiles for different types of work and be hard to disable during focus sessions.

Custom block lists, scheduled blocking, whitelist mode, minimal resource usage, focus session timers, productivity stats, hard-to-disable during sessions