451 Censorship Detector icon

451 Censorship Detector

Extension Delisted

This extension is no longer available in the official store. Delisted on 2025-09-16.

Extension Actions

CRX ID
gohjicbdbalkdcfpaldolimmidackndl
Status
  • Unpublished Long Ago
  • No Privacy Policy
Description from extension meta

451 Censorship Detector verifies in real time if the website in the tab is blocked for legal reasons and turns red

Image from store
451 Censorship Detector
Description from store

This was developed as part of the first prototypes during the IETF 99.

It detects cases of http status code 451.
This is a special status code sent by website to give an indication of:

- Blocking for legal reasons.
- Blocking can be country wise
- But are almost always imposed on ISPs by court order

Sample websites to test: https://github.com/adadgio/safari-reader-js -> Apple's original work https://github.com/mikey1234/plugin.video.itv -> Pirated BBC stream