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BROWSER AND IDE EXTENSION SECURITY

Know what your browser and IDE extensions can access.

Browser extensions see the pages your people work in. IDE extensions, such as those for VS Code, run next to your source code, secrets and terminals. PexLens analyzes both, with their security signals, to identify risky extensions before they become a problem.
Extension Intelligence
Understand permissions, publisher, reputation and extension context.
Risk Detection
Identify suspicious or potentially malicious extension indicators.
Policy Control
Allow, review or block extensions based on security requirements.

THE PROBLEM

Extensions are trusted too easily.

An extension may look harmless, but its permissions and behavior can give it access to browsing activity, source code and developer credentials.
High-risk permissions
Some extensions request access that can expose browsing activity, workspace files, secrets or other sensitive data.
Unknown or untrusted publishers
Publisher identity, reputation and history can provide important security context.
Changes after installation
An extension that was acceptable yesterday can introduce new risk after an update.

HOW PEXLENS SECURES EXTENSIONS

From extension data to security intelligence.

01
Extension Information
Collect extension data and metadata from multiple sources.
Extension details, version, publisher, permissions, source and more.
02
PexLens Security Engine
Normalize signals and run advanced analysis through our security engine.
Correlate data, apply heuristics and threat intelligence.
03
Security Checks
Execute multiple security checks to evaluate risk and behavior.
Permission analysis, publisher reputation, behavior checks, & more.
04
Findings
Generate actionable findings with severity and detailed context.
Critical, high, medium, low and informational findings.
05
Security Decision
Convert findings into clear decisions you can act on with confidence.
Allow, review or block based on your security policies.

DECISION ENGINE

From Detection to Action

Turning Extension Intelligence Into Control
PexLens helps identify risky extensions and take the right action — allow, review, or block.

STAGE 01

Extension Installed

Detects new extensions installed in browsers and IDEs.

STAGE 02

PexLens Analysis

Runs multiple safety checks and calculates the overall risk score.

STAGE 03

Security Finding

Generates findings based on your corporate policy engine.

Allow (trusted extensions continue)

Review (flag for review)

Block (prevent risky extensions)

Extensions can be an open door.

Secure every browser and IDE extension before it becomes a risk.

FAQ

Extension security: common questions

What is extension security?

Extension security is the practice of checking browser and IDE extensions, such as Chrome and VS Code extensions, for malicious code, excessive permissions and risky behaviour before and after they are installed.

Why are browser and IDE extensions a security risk?

Browser extensions can read pages, sessions and clipboard content, and IDE extensions run with access to source code and credentials. A malicious or hijacked extension, often delivered through a routine update, can steal data without the user noticing.

Can PexLens detect malicious VS Code extensions?

Yes. PexLens analyses VS Code and browser extensions for suspicious code, network activity, permission changes and publisher changes, and flags or blocks risky ones based on your policy.

What is extension drift?

Extension drift is when a trusted extension changes after approval, for example through a malicious update or a new maintainer. PexLens re-checks new versions so a safe extension does not silently become a risky one.

Does PexLens block extensions automatically?

You decide. Policies can allow, alert on or block an extension, and security teams see the reason for every decision.

Which plans include browser and IDE extension security?

Browser and IDE extensions, such as VS Code extensions, are protected on the Developer plan and above. Each unique extension version counts toward your package capacity, just like an npm or PyPI package version. There is no separate extension charge.

View all FAQs →

Related

Explore more of the PexLens platform

Developer environment securitySecure IDEs, laptops and AI coding toolsLearn more →Continuous analysisRe-analyse every new version as it shipsLearn more →Policy enforcementYour security and AI policy, enforcedLearn more →PexLens research blogAdvisories, teardowns and guidesLearn more →