According to AlphaMoat, as of 2026-09, the Chrome extension Codex Blocker has 32 users (-20% MoM) — ranked #6,360 of 9,324 AI browser extensions, and #1,610 of 2,418 in General AI.
What is Codex Blocker
Automatically blocks distracting websites unless Codex is actively running. Automatically blocks distracting websites when Codex is not running.
Codex Blocker helps you stay focused by tying website access to Codex activity. When Codex is actively running inference, your selected sites are available. When Codex goes idle, a soft block appears instead of a hard stop.
This is not a generic site blocker. It is designed specifically for developers who use Codex and want their distractions unlocked only when real work is happening.
How it works
- Codex running → sites are unblocked
- Codex idle → a gentle overlay blocks distracting sites
- Optional “roast mode” for extra accountability
- Add, delete, or modify the phrases you want shown
- One emergency override per day if you really need it
No timers. No rigid schedules. No permanent lockouts.
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Setup This extension requires a lightweight local Codex listener to detect activity. Setup takes about 2 minutes.
Instructions are available here: https://github.com/adambulumoff/codex-blocker
Who this is for
- Developers who actively use Codex
- People who want friction, not punishment
- Anyone who finds themselves opening distracting sites the moment Codex finishes
Who this is not for
- People looking for a generic site blocker
- Users who do not use Codex
- Anyone who wants strict parental-style controls
Privacy All activity detection happens locally. No browsing data is collected or sent anywhere.
Extension profile
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.