# Tamper Data for FF Quantum

> - Monitor live requests - Edit headers on live requests - Cancel live requests - Redirect live requests Click the blue cloud in the toolbar to start tampering. When you're done, click it again to stop.

Canonical page: [https://chrome-stats.com/d/tamper-data-for-ff-quantum](https://chrome-stats.com/d/tamper-data-for-ff-quantum)

## Overview

- **ID:** `tamper-data-for-ff-quantum`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Pamblam
- **Category:** web-development,other
- **Daily users:** 2,477
- **Weekly downloads:** 77
- **Rating:** 3.05 / 5 (81 ratings)
- **Version:** 0.5
- **Last updated:** 2019-11-13
- **First published:** 2018-09-13
- **Size:** 42 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/tamper-data-for-ff-quantum/)
- **Website:** [https://github.com/Pamblam/Tamper-Data-for-FF-Quantum/issues](https://github.com/Pamblam/Tamper-Data-for-FF-Quantum/issues)

## Description

Tamper Data for FF Quantum is a Chrome extension that revives the classic Tamper Data functionality for modern Firefox Quantum users. It allows you to monitor live HTTP requests, edit their headers on the fly, cancel unwanted requests, and redirect them with ease. Simply click the blue cloud icon in the toolbar to start tampering and click it again to stop.

This tool is perfect for developers, testers, and privacy-conscious users who want granular control over their web requests directly within the browser. With Tamper Data for FF Quantum, debugging and modifying HTTP traffic has never been simpler or more accessible.

## Rankings

- #1,902 — Overall
- #202 — Web Development
- #294 — Other extensions
- #5 — x data
- #8 — data
- #95 — data privacy

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users repeatedly report the extension only lets you view/capture HTTP requests but not edit them, so it no longer provides the original "tamper" functionality. Reviewers note the name is misleading compared with the old Tamper Data, and point to Firefox changes or lack of updates as the reason (developers are not always blamed). Overall it’s useful for inspection but fails at its primary advertised purpose.

### Pros

- Can capture and display HTTP requests so users can inspect request headers and bodies.
- Provides a simple, visual way to view request contents (useful for debugging or analysis).
- Functions reliably as a read-only viewer even though editing/tampering is not supported

### Cons

- Cannot edit, change, or add request data — the core "tamper" capability from the original add-on is missing.
- Name is misleading or does not match behavior of the old Tamper Data extension (users expect full tamper/edit features).
- Perceived as outdated or not maintained (users report it hasn't been updated and that Firefox changes limit functionality)

## Similar extensions and apps

- [Tamper Data for FF](https://chrome-stats.com/d/tamper-data-for-ff) — 10 users, 1.00 / 5
- [Tamper Data Classic](https://chrome-stats.com/d/tamper-data-classic) — 155 users, 5.00 / 5
- [Enhanced Network Tab](https://chrome-stats.com/d/enhanced-network-tab) — 43 users, 5.00 / 5
- [Headers](https://chrome-stats.com/d/headers) — 507 users, 5.00 / 5
- [Firefox Experiment](https://chrome-stats.com/d/firefox-experiment)
- [Open Temp Container](https://chrome-stats.com/d/temp-containers) — 41 users, 5.00 / 5
- [HackBar Quantum](https://chrome-stats.com/d/hackbar-quantum) — 1,704 users, 4.73 / 5
- [Header Editor](https://chrome-stats.com/d/header-editor) — 12,074 users, 4.71 / 5
- [QuantumVim](https://chrome-stats.com/d/quantumvim) — 8 users, 3.64 / 5
- [Page Hacker](https://chrome-stats.com/d/page-hacker) — 1,057 users, 4.46 / 5
- [Quantum Hackbar](https://chrome-stats.com/d/quantum-hackbar) — 99 users, 4.86 / 5
- [Request Interceptor](https://chrome-stats.com/d/request_interceptor) — 403 users, 5.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/tamper-data-for-ff-quantum)