Against Phishing Extension review
A free browser extension that blocks crypto-focused phishing sites, addresses, and profiles.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Against Phishing Extension is a free browser extension for cryptocurrency users who want phishing checks while browsing crypto projects. It blocks phishing-related websites, wallet addresses, and social media profiles using data from the Against Phishing database. The vendor also says it blocks websites resembling known, whitelisted crypto projects. Its stated fit is solo and small users, and its browser-extension format is a focused option rather than a broad security suite.
Its strongest distinction is the scope of those checks: protection is not limited to suspicious URLs, but also covers wallet addresses, social profiles, and look-alike sites associated with whitelisted crypto projects. That makes it relevant for people who move between project websites and related online profiles. The published feature description does not establish broader protection beyond these crypto-oriented signals, so users seeking general-purpose phishing coverage should compare it with products that explicitly cover a wider set of threats.
The extension is free, with no paid tiers described. The vendor site links to Chrome/Brave and Firefox downloads, while the platform listing identifies Chrome extension support. There is an important maintenance and licensing caveat for Firefox: its add-on history lists a latest version released January 6, 2023, and ongoing maintenance is not established. Although the vendor describes the extension as open source, that Firefox history labels the source code All Rights Reserved. Choose it if free, crypto-specific browser blocking is the priority; consider another option if current maintenance assurance, clear open-source terms, or wider phishing coverage is essential.
Against Phishing Extension pros and cons
- Where it wins
- Blocks phishing-related websites, wallet addresses, and social profiles
- Flags sites resembling known, whitelisted crypto projects
- Free browser extension with data from the Against Phishing database
- Where it doesn't
- Protection is focused on cryptocurrency-related threats
- The latest Firefox version listed was released in January 2023
- Open-source status is unclear: Firefox history says All Rights Reserved
Against Phishing Extension fact sheet, pricing and score →
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