
BlockLang by MadJi
Real-time scam detector with alerts for dangerous websites. Plus: customizable filters to block unwanted domains and languages from Google and Bing search results. Lightweight, fast, and privacy-respecting.
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You'll need Firefox to use this extension
Extension Metadata
About this extension
BlockLang: Real-Time Scam Detection and Cleaner Search Results
Stay safe online with Scam Shield, the built-in protection in BlockLang that checks every website you visit in real time. Dangerous domains are blocked before they even load — keeping you safe from phishing, scam pages, and shady sites.
Plus, BlockLang lets you filter Google and Bing search results by blocking specific languages or domains (like Russian websites), giving you full control over what you see.
Whether you’re a privacy-conscious user, researcher, or just tired of spammy results, BlockLang protects your search experience at every step.
⸻
Why This Extension Was Created
Originally built to solve a real issue for Bulgarian users — search results showing irrelevant Russian sites — BlockLang started as a language/domain filter. Now it’s grown into a lightweight privacy tool with scam protection built in.
⸻
What It Does
• Scam Shield checks websites in real time and blocks dangerous ones
• Shows full-page warning if a domain is flagged as Dangerous
• Adds filters like -lang:ru or -site:*.ru to Google/Bing queries
• Lets you toggle filters ON/OFF anytime
• Add custom blacklists (e.g. reddit.com, cnn.com, etc.)
• Filters apply instantly, no reload needed
⸻
Scam Shield Features
• Real-time scam domain analysis (external & internal signals)
• Automatic blocking for domains flagged as Dangerous
• Full-page warning + visual indicator for unsafe sites
• Smart caching avoids repeat checks on the same domains
⸻
How Scam Shield Works
When enabled, Scam Shield runs silently in the background. Every site you visit is checked using real-time data. If it’s marked as dangerous, BlockLang shows a warning page before the site loads.
Note: Scam Shield goes beyond simple blocklists. It analyzes domains live and might occasionally produce false positives or miss some threats. Always use your own judgment. You can report misclassifications here: https://blocklang.org/contact
⸻
Other Features
• Simple ON/OFF popup toggle
• Works on Google and Bing
• Add/remove filters easily
• Optional Russian filter toggle (Filt-Ru)
• No tracking – data stays local
⸻
Using the Custom Blacklist
You can block any domain, subdomain, or language. Just type:
• cnn.com
• .example.org
• language:ru
Examples:
• Search: "keyword" with Russian filter → blocks .ru results
• Added filter: reddit.com → blocks Reddit from results
⸻
Privacy
Your data stays local:
• No tracking
• No external storage or analytics
• No background network activity
Privacy Policy: https://blocklang.org/privacy.html
Terms of Use: https://blocklang.org/terms.html
⸻
Also available for:
• Chrome Web Store - (https://chromewebstore.google.com/detail/pnpnmglphaeomidfhjcehmdemmkmbkol?utm_source=item-share-cb)
• Safari (iOS/macOS) - (https://apps.apple.com/app/blocklang-search-filter/id6469648817)
Stay safe online with Scam Shield, the built-in protection in BlockLang that checks every website you visit in real time. Dangerous domains are blocked before they even load — keeping you safe from phishing, scam pages, and shady sites.
Plus, BlockLang lets you filter Google and Bing search results by blocking specific languages or domains (like Russian websites), giving you full control over what you see.
Whether you’re a privacy-conscious user, researcher, or just tired of spammy results, BlockLang protects your search experience at every step.
⸻
Why This Extension Was Created
Originally built to solve a real issue for Bulgarian users — search results showing irrelevant Russian sites — BlockLang started as a language/domain filter. Now it’s grown into a lightweight privacy tool with scam protection built in.
⸻
What It Does
• Scam Shield checks websites in real time and blocks dangerous ones
• Shows full-page warning if a domain is flagged as Dangerous
• Adds filters like -lang:ru or -site:*.ru to Google/Bing queries
• Lets you toggle filters ON/OFF anytime
• Add custom blacklists (e.g. reddit.com, cnn.com, etc.)
• Filters apply instantly, no reload needed
⸻
Scam Shield Features
• Real-time scam domain analysis (external & internal signals)
• Automatic blocking for domains flagged as Dangerous
• Full-page warning + visual indicator for unsafe sites
• Smart caching avoids repeat checks on the same domains
⸻
How Scam Shield Works
When enabled, Scam Shield runs silently in the background. Every site you visit is checked using real-time data. If it’s marked as dangerous, BlockLang shows a warning page before the site loads.
Note: Scam Shield goes beyond simple blocklists. It analyzes domains live and might occasionally produce false positives or miss some threats. Always use your own judgment. You can report misclassifications here: https://blocklang.org/contact
⸻
Other Features
• Simple ON/OFF popup toggle
• Works on Google and Bing
• Add/remove filters easily
• Optional Russian filter toggle (Filt-Ru)
• No tracking – data stays local
⸻
Using the Custom Blacklist
You can block any domain, subdomain, or language. Just type:
• cnn.com
• .example.org
• language:ru
Examples:
• Search: "keyword" with Russian filter → blocks .ru results
• Added filter: reddit.com → blocks Reddit from results
⸻
Privacy
Your data stays local:
• No tracking
• No external storage or analytics
• No background network activity
Privacy Policy: https://blocklang.org/privacy.html
Terms of Use: https://blocklang.org/terms.html
⸻
Also available for:
• Chrome Web Store - (https://chromewebstore.google.com/detail/pnpnmglphaeomidfhjcehmdemmkmbkol?utm_source=item-share-cb)
• Safari (iOS/macOS) - (https://apps.apple.com/app/blocklang-search-filter/id6469648817)
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Permissions and dataLearn more
Required permissions:
- Display notifications to you
- Access browser tabs
- Access your data for sites in the google.com domain
- Access your data for sites in the bing.com domain
Optional permissions:
- Access your data for all websites
More information
- Add-on Links
- Version
- 1.5.1
- Size
- 33.79 KB
- Last updated
- 10 days ago (Sep 4, 2025)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- End-User License Agreement
- Read the license agreement for this add-on
- Version History
- Add to collection
Release notes for 1.5.1
Improved caching logic
This update reduces unnecessary network requests by enhancing the internal caching mechanism, leading to faster performance and lower data usage.
This update reduces unnecessary network requests by enhancing the internal caching mechanism, leading to faster performance and lower data usage.
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