Ultimate Blocker от Naman Kumar

Ultimate Blocker helps you stay focused by blocking distracting websites and hiding distracting page elements — only where and when you decide. Organize website blocks and CSS cosmetic filters into groups, schedule when they apply, and add strictness hurdles that make bypassing your own rules a deliberate choice.

Features:

1. Block or allow websites in customizable groups, with path-specific rules like 'youtube.com/shorts' and '*' wildcards to target just what you choose.
2. Block parts of websites with CSS cosmetic filters.
3. Turn selected websites gray and boring with grayscale groups.
4. Set custom schedules per group — pick active days and times.
5. Take timed breaks with a per-day or per-hour budget — pause group rules for a few minutes, a limited number of times, optionally guarded by their own break password or a delay before breaks happen.
6. Protect groups (prevent weakening, disabling, or deleting them) with either of these options - 1) Password 2) Lock them until a chosen date and time 3) While their schedule is active.
7. Delay protection (the killer feature) makes weakening, disabling, or deleting a group take effect only after a wait, giving you time to reconsider.
8. A clear blocked page tells you exactly which group stopped you and shows the full address as a clickable link, so you can retry it if a rule has changed.
9. Export and import your full setup as JSON to back up your groups or move them to another browser.