Epupp: Live Tamper your Web

By: PEZ

Tamper with web pages, live and/or with userscripts

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Install

Features & Capabilities

Epupp has two modes of operation:

Live REPL connection from your editor to the web page, letting you inspect and modify the page on the fly, with or without the assistance of an AI agent.
Userscripts: Tampermonkey style. Target all websites, or any subset of the web's pages, with prepared scripts that modify or query information from the page. Userscripts can be configured to start before the page loads (document-start), when the DOM is ready but resources are still loading (document-end), or after everything has settled (document-idle).

The two form a powerful pair. The live REPL connection, while happily supporting one-off changes or data extractions, is also a very efficient and fun means to interactively develop userscripts.

User Growth & Download Statistics

Add-on

By:

PEZ

Daily users:

15 -4

Rating:

5.00

(1)

Version:

0.0.20 Last updated: 2026-05-13

Version code:

6260543

Creation date:

2025-12-27

Risk:

Permissions:

Host permissions:

<all_urls>

Size:

794.39KB

Email:

pe*****@pezius.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-23

Compare stats and ranking:

Ranking

# 26,681 ▼ 2,614

Other rankings

#118 in live keyword 44 ▼ 11

Other platforms

Epupp: Live Tamper your Web (v0.0.20)

103 5.00

(3)

For Developers

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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:

PEZ

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/epupp/

Email:

pe*****@pezius.com

Website:

https://github.com/PEZ/epupp/issues

Is Epupp: Live Tamper your Web 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.

Epupp: Live Tamper your Web requires a few sensitive permissions. 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.

Epupp: Live Tamper your Web 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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