Block File Types icon

Block File Types Chrome Extension Analysis

Automation & Workflow Efficiency

Chrome extension ID: idcfmfbkmhjnnkfdhcckcoopllbmhnmg

Block File Types is a Chrome extension designed to prevent specific local file types from opening within the browser. Configuration is managed through a JSON object, allowing administrators to define which file extensions should be blocked.

Developer:Clay
Version:0.0.3
Size:29.75KiB
Last updated:

Overview

Installs

80K+

Rating

1.2

23 reviews

Languages

1 locales

Includes English

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

Backed by review samples

Macro category

Automation & Workflow Efficiency

Pricing friction

Low review signal

Complaint intensity

High review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

This extension positions itself as a tool to block local file types from opening in the browser, configured via JSON. It is advertised for administrative use.

Inferred product pattern

A configuration-based file blocking utility with significant reported implementation flaws.

Review-backed pain points

Users report that the extension is easily bypassed by simple file name modifications (e.g., changing extensions to lowercase or adding numbers). It also causes significant performance issues, potentially crashing devices by opening too many block screens and consuming excessive resources. This is a major concern for educational institutions where it's used on school devices.

Observed feature gaps

The primary observed gap is the complete lack of effectiveness in blocking file types due to easily circumvented bypass methods. The performance issues suggest a lack of optimization or flawed implementation.

Tags
File BlockerProductivity ToolWorkflow
Target users

- School administrators

- IT administrators

Primary use cases

- Preventing users from opening specific file types

- Enforcing file type policies

Positive themes

No positive theme data.

Negative themes

- The extension does not work as intended and can be easily bypassed.

- The extension causes performance issues, such as opening numerous block screens that can overload device memory and crash the browser.

- The extension blocks necessary files, hindering legitimate use, particularly in educational settings.

- The extension's bypass methods are trivial, making its security ineffective.

Observed friction

- Performance complaints detected

- No pricing friction observed as the extension appears to be free.

Evidence boundary: Reviews indicate the extension fails to effectively block file types and causes significant performance degradation, including potential device crashes. Some users also report it can be easily bypassed. The number of reviews is small, and sentiment is overwhelmingly negative, suggesting a potential lack of broad user base or highly dissatisfied users.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

No specific support complaints were observed, but the recurring functional and performance issues suggest a lack of effective developer response.

Reliability

Users report severe reliability issues, including the extension failing to block files and causing significant performance degradation that can lead to device crashes.

Privacy

No privacy-related complaints were observed in the provided reviews.

Access & pricing

- Free usage observed

- No clear access signal

- Free plan or free usage claimed

Store listing facts

Listing assets

- Screenshots: 1

- Videos: 0

- Languages: 1

Trust signals

- Privacy policy

- Developer contact

Store metadata

- Version: 0.0.3

- Size: 29.75KiB

- Last updated:

Store description excerpt
Short excerpt from the public Chrome Web Store listing; full copy is available on the official store page.
Block local file types from opening in the browser. Admin configured with JSON: {"blocktypes": {"Value": ["html", "js"]}}

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

block file types chrome extensionprevent file opening browserfile type blockerlocal file securitybrowser file policy

Comparison

alternative to file blockerbetter file blockingeffective file security

Problem

files blockedbrowser securityperformance issues chrome extensionextension crashing browser

Alternative

browser security toolsfile management extensionswebsite blocking

Similar extensions

Jump to related discovery paths:

FAQ

What is Block File Types mainly used for?
Block File Types is a Chrome extension designed to prevent specific local file types from opening within the browser. Configuration is managed through a JSON object, allowing administrators to define which file extensions should be blocked.
What market signals stand out?
Visible niche traction with limited review base. Last known update: 04/20/2026.
What should builders compare before entering this space?
Compare install concentration, rating quality, update recency, screenshots, developer portfolio, listing claims, and review-backed friction signals.
Is this page review-backed?
Backed by review samples. This page combines store metadata with selected review signals, while raw store metrics remain visible for comparison.

Screenshots

Block File Types screenshot

Links

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