Chrome Web StoreNo malware found
In code review
Our reviewer read this extension’s code and found no malicious behaviour. An automated risk flag was reviewed and overturned.
What our analysis found
Block File Types, used by 500,000 people, showed no malicious code in Extension Auditor's review. It comes from a trusted publisher and was last updated in April 2026.
Analyst notes
The extension performs exactly its stated purpose: blocking file:// URLs according to admin-configured file extensions. It uses only essential permissions (tabs, storage, file://*) and makes no network requests, collects no user data, and contains no obfuscated or suspicious code. The ML model was likely triggered by the broad file://* permission, but the extension's behavior is benign and transparent.
Block File Types Chrome extension security report
ID: idcfmfbkmhjnnkfdhcckcoopllbmhnmg
Supported Languages
Extension Info & Metadata
Publisher Contextual Analysis
- Author
- Clay
- Privacy
- Privacy Policy
- MX records exist
- Yes
- Domain exists
- Yes
- Is disposable
- No
- Is role-based
- No
- Mailbox exists
- Yes
- Website
- Visit
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Screenshots & videos
Install growth
Each row lists a threat category the scanner evaluates. A checkmark means the review ran and found no matching issues in that category for this version.
Data Exfiltration
Code review completed; no malicious patterns detected for this category.
Unauthorized Data Collection
Code review completed; no malicious patterns detected for this category.
Network Interception
Code review completed; no malicious patterns detected for this category.
Code Injection
Code review completed; no malicious patterns detected for this category.
Credential Theft
Code review completed; no malicious patterns detected for this category.
Obfuscation
Code review completed; no malicious patterns detected for this category.
Tracking
Code review completed; no malicious patterns detected for this category.
Privilege Escalation
Code review completed; no malicious patterns detected for this category.
Phishing
Code review completed; no malicious patterns detected for this category.
Remote Code Loading
Code review completed; no malicious patterns detected for this category.
Other
Code review completed; no malicious patterns detected for this category.
About this extension
Block File Types
Read the publisher’s full description
Block local file types from opening in the browser. Admin configured with JSON: {"blocktypes": {"Value": ["html", "js"]}}
User reviews
Extension files
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No network indicators were extracted from this version.
Code Diff
Compare extension code between any two versions.
0 changed files detected
No comparable text files found between these versions.
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