# Horizon

> Web application security testing tool for Firefox

Canonical page: [https://chrome-stats.com/d/horizon-security-tool](https://chrome-stats.com/d/horizon-security-tool)

## Overview

- **ID:** `horizon-security-tool`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Vladan Tomic
- **Category:** web-development,privacy-security,other
- **Daily users:** 2
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.2resigned1
- **Last updated:** 2024-04-25
- **First published:** 2018-02-12
- **Size:** 974 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/horizon-security-tool/)
- **Website:** [https://github.com/tomicvladan/horizon-security-tool](https://github.com/tomicvladan/horizon-security-tool)

## Description

Horizon is a web application security testing tool for Firefox. It collects information about links, forms, and asynchronous HTTP requests while browsing websites. Captured forms and requests can be modified and resent for testing purposes.

## Rankings

- #60,983 — Overall
- #112 — jquery

## Permissions and access

### Permissions

- `tabs`
- `activeTab`
- `webRequest`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low 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/horizon-security-tool)