MalExt Sentry - Malicious Extension Scanner

Tracking since Apr 7, 2026.

Changelog

• Apr 19, 2026
  description

  MalExt Sentry scans your installed browser extensions against a continuously updated database of known malicious extensions. It runs locally on your machine and never sends your data anywhere.
  The extension checks every installed extension ID against a public threat database hosted on GitHub, maintained by the Malicious Extension Sentry open source project.
  
  If any of your extensions have been flagged as malicious, you get an immediate alert with details about the threat.
  
  Scans run automatically in the background so you stay protected without having to think about it. You can also trigger a manual rescan at any time. The threat database is cached locally to keep things fast and reduce network usage.
  
  Your privacy matters. No browsing data, no analytics, no telemetry, no tracking. The only network request the extension ever makes is a one way download of the public threat database. Nothing about you or your extensions is ever sent anywhere.
  
  Whether you want to check if a recently removed Chrome Web Store extension is still sitting in your browser, or you just want peace of mind that your extensions are safe, MalExt Sentry has you covered.
  
  Features:
  - Scans installed extensions against a verified malicious extension database
  - Automatic background scanning every 6 hours
  - Manual rescan on demand
  - Fully local and private, no data leaves your browser
  - Open source threat intelligence database with regular updates
  - Lightweight with minimal resource usage

  MalExt Sentry - Malicious Extension Scanner
  
  Your personal guard against harmful Chrome extensions.
  
  MalExt Sentry automatically scans every extension installed in your browser against a continuously updated, open-source database of known malicious and removed extensions. If a threat is detected, you get an instant alert with a one-click uninstall.
  
  What it checks for:
  
  Known malicious extensions - cross-references your installed extensions against a live database of extensions that have been flagged or removed from the Chrome Web Store for harmful behavior. The database is actively maintained and pulled directly from GitHub.
  
  Dangerous permissions - flags extensions that hold unusually powerful permissions, with plain-English explanations of what each one actually means. Permissions it watches for include:
  
  Script injection (can run code on any page you visit)
  Cookie access (can read your login sessions)
  Clipboard reading (can silently read what you copy)
  Full page control, traffic interception, system access, and more
  Permission changes - alerts you if an extension silently gains new dangerous permissions after an update, so you are never caught off-guard by a trusted tool going rogue.
  
  Key features
  
  Scans against a live, open-source threat database hosted on GitHub
  Automatic background scan every 6 hours
  - Instant alert when a newly installed extension matches a known threat
  - Permission explanations with no technical jargon
  - Trust system: mark any extension as trusted to permanently silence alerts for it
  - Auto re-flags trusted extensions if their permissions change after an update
  - Export scan report to clipboard for sharing or logging
  - Manual rescan with one click
  - Privacy first
  
  Runs entirely on your device. The only network request is a one-way download of the public threat database from GitHub. No data about you, your extensions, or your browsing is ever collected, transmitted, or stored outside your own browser.
  
  No telemetry. No analytics. No tracking. Ever.
  
  Open source and actively maintained. Built for security-conscious users who want to know exactly what is running in their browser.
  
  Note on the "management" permission: MalExt Sentry requires this permission solely to read your list of installed extensions. It cannot install, modify, or remove extensions without your explicit confirmation.

• Apr 19, 2026
  short_description

  Check your installed extensions against a database of known malicious extensions

  Scans your extensions against a live malicious extension database and flags dangerous permissions - with explanations.

• Apr 19, 2026
  name

  MalExt Sentry

  MalExt Sentry - Malicious Extension Scanner

• Apr 19, 2026
  permissions

  management, storage, alarms

  management, storage, alarms, notifications

• Apr 7, 2026
  description

  MalExt Sentry scans your installed browser extensions against a continuously updated database of known malicious extensions. It runs locally on your machine and never sends your data anywhere.
  The extension checks every installed extension ID against a public threat database hosted on GitHub, maintained by the Malicious Extension Sentry open source project. If any of your extensions have been flagged as malicious, you get an immediate alert with details about the threat.
  Scans run automatically every 6 hours in the background so you stay protected without having to think about it. You can also trigger a manual rescan at any time. The threat database is cached locally to keep things fast and reduce network usage.
  Your privacy matters. No browsing data, no analytics, no telemetry, no tracking. The only network request the extension ever makes is a one way download of the public threat database. Nothing about you or your extensions is ever sent anywhere.
  Whether you want to check if a recently removed Chrome Web Store extension is still sitting in your browser, or you just want peace of mind that your extensions are safe, MalExt Sentry has you covered.
  Features:
  
  Scans installed extensions against a verified malicious extension database
  - Automatic background scanning every 6 hours
  - Manual rescan on demand
  - Fully local and private, no data leaves your browser
  - Open source threat intelligence database with regular updates
  - Lightweight with minimal resource usage

  MalExt Sentry scans your installed browser extensions against a continuously updated database of known malicious extensions. It runs locally on your machine and never sends your data anywhere.
  The extension checks every installed extension ID against a public threat database hosted on GitHub, maintained by the Malicious Extension Sentry open source project.
  
  If any of your extensions have been flagged as malicious, you get an immediate alert with details about the threat.
  
  Scans run automatically in the background so you stay protected without having to think about it. You can also trigger a manual rescan at any time. The threat database is cached locally to keep things fast and reduce network usage.
  
  Your privacy matters. No browsing data, no analytics, no telemetry, no tracking. The only network request the extension ever makes is a one way download of the public threat database. Nothing about you or your extensions is ever sent anywhere.
  
  Whether you want to check if a recently removed Chrome Web Store extension is still sitting in your browser, or you just want peace of mind that your extensions are safe, MalExt Sentry has you covered.
  
  Features:
  - Scans installed extensions against a verified malicious extension database
  - Automatic background scanning every 6 hours
  - Manual rescan on demand
  - Fully local and private, no data leaves your browser
  - Open source threat intelligence database with regular updates
  - Lightweight with minimal resource usage

Permissions & access

Permissions

managementstoragealarmsnotifications

Host access

https://raw.githubusercontent.com/toborrm9/malicious_extension_sentry/*

Screenshots

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