# Add‑Param

> Quickly opens the current URL with discovered and manually entered query parameters in customizable batches, useful for penetration testing and debugging.

Canonical page: [https://chrome-stats.com/d/add-param](https://chrome-stats.com/d/add-param)

## Overview

- **ID:** `add-param`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Bigdav
- **Category:** web-development,privacy-security,search-tools
- **Daily users:** 4
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.1
- **Last updated:** 2025-08-30
- **First published:** 2025-08-27
- **Size:** 39 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/add-param/)

## Description

Add‑Param is a Firefox extension designed for security researchers, bug bounty hunters, and developers who need to test how web applications handle query parameters.

Features:
- Extracts parameters automatically from links, forms, URL fragments, and network requests (XHR/fetch).
- Allows adding custom (manual) parameters.
- Merges automatic and manual parameters, removes duplicates, and appends common values to each.
- Opens generated URLs in new tabs in batches of 20 for efficient testing.
- Provides a modern dark UI with a dedicated "Run Auto Extract" control.

The extension runs entirely locally, with no external requests or services.

## Rankings

- #47,843 — Overall
- #95 — fragment

## Permissions and access

### Permissions

- `tabs`
- `activeTab`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/add-param)