Who should use Upload Blocker?

Upload Blocker is an open-source project built for firefox users who want to control file uploads.

Is Upload Blocker free?

Yes — Upload Blocker is free to use.

What platforms does Upload Blocker run on?

Upload Blocker runs on the web and embeddable surfaces.

Is Upload Blocker still active?

Unverified. Upload Blocker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Upload Blocker?

Similar projects tracked by PulseGate include File Upload Blocker, Download Blocker, and Video Blocker.

Who develops Upload Blocker?

Upload Blocker is developed by ClearCode Inc., based in Japan.

How long has Upload Blocker been around?

Upload Blocker first shipped in 2018.

Back to the index

Upload Blocker

Name: Upload Blocker
Author: ClearCode Inc.

gitlab.comBrowser DevTools & extensions🇯🇵

A Firefox addon to block file upload forms

FreeWebEmbeddable

Visit gitlab.com

Overview

2 features

In the Browser DevTools & extensions space, Upload Blocker takes a focused approach. It focuses on preventing websites from submitting files through upload forms without the user's intent. It is built as an open-source project for firefox users who want to control file uploads. It is available for free. It runs on the web and embeddable surfaces.

It is developed by ClearCode Inc. (Japan), and it first shipped in 2018.

Upload blocking
Firefox integration

Built with & integrations

Framework

Rails

Hosting

Cloudflare

AI providers

openai

Runs on

BrowserEmbeddable

Detected from

Cloudflare: cf-ray header · cf-cache-status header

Trust & compliance

Verified signals

HTTPSFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed18 Sep · 19:27 UTC
Upload Blocker verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Upload Blocker

What does Upload Blocker do?: Upload Blocker focuses on preventing websites from submitting files through upload forms without the user's intent. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Upload Blocker?: Upload Blocker is an open-source project built for firefox users who want to control file uploads.
Is Upload Blocker free?: Yes — Upload Blocker is free to use.
What platforms does Upload Blocker run on?: Upload Blocker runs on the web and embeddable surfaces.
Is Upload Blocker still active?: Unverified. Upload Blocker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Upload Blocker?: Similar projects tracked by PulseGate include File Upload Blocker, Download Blocker, and Video Blocker.File Upload Blocker Download Blocker Video Blocker
Who develops Upload Blocker?: Upload Blocker is developed by ClearCode Inc., based in Japan.
How long has Upload Blocker been around?: Upload Blocker first shipped in 2018.

At a glance

Pricing: Free
Platforms: Web · API
Languages: English
First seen: 18 Sep 2026
Built for: Firefox users who want to control file uploads
Model: Open source
Solves: Preventing websites from submitting files through upload forms without the user's intent.

Registered as

Firefox Add-ons: upload-blocker

Developer

🇯🇵ClearCode Inc.

Index record

Indexed: 18 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 18 Sep 2026

Identity audit (12)

Slug: upload-blocker-gitlab-com
Lifecycle state recorded: 18 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 18 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 18 Sep 2026
Canonical URL: https://gitlab.com/clear-code/upload-blocker

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