Postal Manager

Name: Postal Manager
Author: Miami Mint

Postal Manager is a complete envelope printing and shipping workstation. Design precise address layouts, generate USPS barcodes, and track packages and First Class envelopes directly from your browser without requiring a monthly subscription.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-25

Version:

3.2

Last updated: 2026-09-11

Features & Capabilities

Streamline Your Shipping Workflow Postal Manager by Factory Engine turns your browser into a dedicated shipping workstation. Designed for high-volume shippers, small businesses, and e-commerce sellers, it allows you to print perfectly formatted envelopes, generate USPS Intelligent Mail Barcodes (IMb), and track your packages without ever leaving your browser or paying monthly subscription fees.

Core Features (Always Free):

Smart Envelope Presets: Save custom dimensions and margin layouts for any physical envelope size (Standard #10, A2, 6x9 Booklets, etc.).


One-Click Pasting: Instantly grab address blocks directly from your operating system's clipboard.
Dynamic Barcode Generation: Generate strict, USPS-compliant Intelligent Mail Barcodes using your Mailer ID (MID).

Domestic & International Modes: Automatically adjust physical layouts, endorsements, and mail class text based on the destination.

Factory Engine Pro Features (One-Time Upgrade):

Local Shipping Database: Automatically log every printed label, recipient, and tracking number into your secure browser vault.


Universal Carrier Tracking: Track packages across the USPS, FedEx, UPS, and international networks using the live tracking drawer.
Auto-Serialization: Automatically increment your USPS barcode serial numbers to prevent duplicates.

CSV Export: Export your entire shipping history to a spreadsheet for accounting and record-keeping in one click.

Privacy by Design Your data belongs to you. Postal Manager processes all barcode mathematics and layouts entirely on your local machine. Your shipping log and address histories are saved strictly to your browser's local, secure vault and are never transmitted to third-party marketing servers.

User Growth & Download Statistics

Add-on

By:

Miami Mint

Daily users:

Version:

3.2 Last updated: 2026-09-11

Version code:

6477406

Creation date:

2026-08-26

Firefox add-on GUID:

postalmanager@miamimint.com

Firefox add-on numeric ID:

3060988

Firefox on Android:

Risk:

Permissions:

storage

Host permissions:

https://services.usps.com/*
https://iv.usps.com/*
https://fe.plat4ma.com/*
http://127.0.0.1/*
http://localhost/*

Content scripts matches:

fe.plat4ma.com

Size:

567.48KB

Email:

su*****@plat4ma.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-25

Compare stats and ranking:

Ranking

# 110,237 ▼ 40

Other rankings

#244 in spreadsheet keyword 10 ▼ 7#247 in e-commerce keyword 11 ▼ 2

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:

Miami Mint

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/postal-manager/

Email:

su*****@plat4ma.com

Website:

https://fe.plat4ma.com

Permission Change History

2026-08-31: Version 1.0 → 3.1

Add Host permissions: http://127.0.0.1/* http://localhost/*

Is Postal Manager 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.

Postal Manager requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
Medium ******* ****** ** *** ********* ******** ************ ********* **** *********

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.

Postal Manager 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.
High **** ********* *** ******** ****** *** ********** *** *** ** ****** ** *****
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****