MailBoxster Web Security review
A free Chrome extension for local page checks, with protection focused on selected threats.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
MailBoxster Web Security is a Chrome extension from AZURO SOFTWARE that checks visited URLs and page signals for phishing and suspicious activity. It is aimed at privacy-conscious solo users and small teams who want browser-level checks without an account. The extension analyzes locally in the browser and keeps settings and block history on-device. It is browser protection, not an email client, so it does not scan email for phishing.
Its detection scope is specific rather than broad: bundled rules and reputation lists are combined with signals from page text, links and form structure. The extension can identify selected fake sign-in forms, shared-document lures, device-code requests and support scams, and helps prevent selected password transmissions to Telegram or Discord. When indicators are uncertain, it warns; when evidence is stronger, it blocks navigation. Explanations and confirmed temporary exceptions for the current tab and domain give users some control over interruptions. This makes it a fit for users seeking local checks against those selected browser threats, not a substitute for wider email or security coverage.
The published description presents the extension as free at launch, while its terms say free access is not guaranteed permanently. Its current platform is Chrome; Safari is described as coming soon. There is no threat-detection dashboard, and the product's protection is confined to the browser extension rather than email. Choose it if on-device analysis, no account requirement and targeted page checks matter most. Look elsewhere if email phishing detection, a broader platform reach or a dashboard is central to your requirements.
MailBoxster Web Security pros and cons
- Where it wins
- Analyzes URLs and page signals with bundled rules and reputation lists
- Explains blocks and offers temporary exceptions for the tab and domain
- Keeps settings and block history on-device; no account is required
- Where it doesn't
- Chrome extension only; Safari is listed as coming soon
- Does not detect phishing in email
- Free access at launch is not guaranteed to remain free
MailBoxster Web Security fact sheet, pricing and score →
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