Custom Header Tailor

Name: Custom Header Tailor
Author: Anto

Override or add custom HTTP headers on requests and responses. Two lists (request/response), per-rule on/off toggle and optional URL match pattern. Rules are saved locally and persist across restarts. No data collection.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-07-25

Version:

1.0.1

Last updated: 2026-07-04

Features & Capabilities

Custom Headers lets you override or add HTTP headers on the browser's requests and responses. Features

Two separate sections: Request Headers and Response Headers.
Add or remove header rows on the fly (name + value).
Enable/disable toggle on every row.
Optional per-row "URL match pattern" to limit a rule to specific sites (default: all URLs).
Smart behaviour: if a header already exists, its value is replaced; otherwise it is added.
Rules are stored locally and persist across browser restarts.
Clean, minimal popup, localized in 12 languages.

Privacy The extension does not collect, store remotely, or transmit any data. Every rule stays in your browser's local storage. Built entirely on the standard declarativeNetRequest API, with no external dependencies. Open source (MPL-2.0): https://gitlab.com/mrdjtoto/mozilla-custom-headers

User Growth & Download Statistics

Add-on

By:

Anto

Daily users:

Version:

1.0.1 Last updated: 2026-07-04

Version code:

6332713

Creation date:

2026-07-01

Risk:

Permissions:

declarativeNetRequest
declarativeNetRequestWithHostAccess
storage

Host permissions:

<all_urls>

Size:

41.76KB

Email:

ru*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-25

Compare stats and ranking:

Ranking

# 109,288 ▲

Other rankings

#202 in header keyword 24 ▲ #224 in override keyword 10 ▲

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:

Anto

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/mozlla-custom-headers/

Email:

ru*****@gmail.com

Website:

https://gitlab.com/mrdjtoto/mozilla-custom-headers.git

Is Custom Header Tailor 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.

Custom Header Tailor 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.

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.

Custom Header Tailor is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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