Voidly Censorship Monitor by EmperorMew

Measures whether frequently-censored websites load from your network, and reports the results to open censorship research. Never touches your browsing.

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About this extension

Voidly Censorship Monitor turns your browser into a measurement point for open
internet-censorship research.

Every 15 minutes it tests 20 sites from a fixed, published list of 62 — news
outlets, social platforms, messaging apps and privacy tools that are blocked in
some countries — and records whether each one loaded from your network.

WHAT MAKES THIS VERSION DIFFERENT

Earlier versions reported a site as blocked whenever a request failed. That
cannot tell real interference apart from a domain that no longer exists, a
captive portal, or a local content blocker — and it produces a great many false
positives.

This version reads real HTTP responses and checks an independent public DNS
resolver before reporting anything:

• A site nobody can resolve is recorded as a dead domain, not as censorship
• A bot-check page is recorded as reachable, because the path is open
• A result the extension cannot stand behind is discarded rather than sent

PRIVACY

• No browsing history. There is no content script, no tabs permission and no
history access
• Your cookies are never attached to a test
• Permissions are an explicit list of the sites being tested, not wildcards
• Nothing is collected beyond the outcome of the extension's own scheduled tests

Works on Firefox for desktop and Firefox for Android.

Free, and free of charge — no account, no sign-in, no payment.

Rated 0 by 0 reviewers

Permissions and data

Optional permissions:

Access your data for accessnow.org
Access your data for aljazeera.com
Access your data for amnesty.org
Access your data for archive.org
Access your data for article19.org
Access your data for bbc.com
Access your data for bing.com
Access your data for cnn.com
Access your data for cpj.org
Access your data for discord.com
Access your data for dropbox.com
Access your data for duckduckgo.com
Access your data for dw.com
Access your data for eff.org
Access your data for expressvpn.com
Access your data for facebook.com
Access your data for freedomhouse.org
Access your data for getlantern.org
Access your data for github.com
Access your data for gitlab.com
Access your data for google.com
Access your data for hackerone.com
Access your data for hrw.org
Access your data for instagram.com
Access your data for line.me
Access your data for linkedin.com
Access your data for medium.com
Access your data for messenger.com
Access your data for mullvad.net
Access your data for nordvpn.com
Access your data for nytimes.com
Access your data for pastebin.com
Access your data for pinterest.com
Access your data for proton.me
Access your data for protonvpn.com
Access your data for psiphon.ca
Access your data for reddit.com
Access your data for reuters.com
Access your data for rferl.org
Access your data for rsf.org
Access your data for signal.org
Access your data for skype.com
Access your data for snapchat.com
Access your data for stackoverflow.com
Access your data for substack.com
Access your data for surfshark.com
Access your data for telegram.org
Access your data for theguardian.com
Access your data for tiktok.com
Access your data for torproject.org
Access your data for tumblr.com
Access your data for twitter.com
Access your data for viber.com
Access your data for voanews.com
Access your data for vpngate.net
Access your data for washingtonpost.com
Access your data for wechat.com
Access your data for whatsapp.com
Access your data for wikileaks.org
Access your data for wikipedia.org
Access your data for x.com
Access your data for youtube.com
Access your data for api.voidly.ai
Access your data for cloudflare-dns.com

Data collection:

The developer says this extension doesn't require data collection.