Tamper Data Classic

Name: Tamper Data Classic
Rating: 5 (1 reviews)
Author: SamDev

By: SamDev

View and modify HTTP/HTTPS headers and POST data. Modern rewrite of the classic extension.

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Features & Capabilities

Tamper Data lets you intercept, view, and modify HTTP/HTTPS requests in real time — directly from your browser. Inspired by the classic Tamper Data extension, this modern rewrite brings back the ability to inspect and manipulate web traffic without relying on external proxy tools. Features:

Monitor all outgoing HTTP and HTTPS requests in real time View and edit request headers before they are sent Modify POST data on the fly Filter requests by URL, method, or content type Pause, tamper, and release individual requests Lightweight and privacy-friendly — no data is collected or transmitted

Use cases:

Web development and debugging Security testing and penetration testing API troubleshooting Learning how web requests work under the hood

All processing happens locally in your browser. No data ever leaves your machine.

User Growth & Download Statistics

Add-on

By:

SamDev

Daily users:

65 3

Rating:

5.00

(1)

Version:

2.1.0 Last updated: 2026-02-23

Version code:

6158392

Creation date:

2026-02-15

Risk:

Permissions:

Size:

30.53KB

Email:

vo*****@gmail.com

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 13,590 ▲ 250

Other rankings

#26 in data keyword 52 ▲ 1#41 in x data keyword 11 ▲ 1#50 in class keyword 5 ▲ 2#81 in modify keyword 45 ▲ 3#150 in data privacy keyword 37 ▲ 1

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

SamDev

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/tamper-data-classic/

Email:

vo*****@gmail.com

User Reviews

This addon seems to no longer work. Could you possibly update it? Writing this review in hopes you return and can update.

by Le*****, 2026-05-06

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Is Tamper Data Classic Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Tamper Data Classic requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Tamper Data Classic is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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