# Leery

> Notifies when a site has possibly insecure settings like missing security headers. Feel free to contribute! https://github.com/mprencipe/leery Icon(s) by Icon8 https://icons8.com.

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

## Overview

- **ID:** `leery`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Massimo Prencipe
- **Category:** web-development,privacy-security
- **Daily users:** 1
- **Version:** 2.0
- **Last updated:** 2021-06-11
- **First published:** 2020-03-04
- **Size:** 47 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/leery/)

## Description

Leery is a Firefox add-on that notifies when a website's settings may be insecure due to missing security headers. It helps users stay vigilant and aware of potential security issues while browsing.

## Rankings

- #109,063 — Overall

## Permissions and access

### Permissions

- `webRequest`
- `tabs`
- `storage`
- `<all_urls>`

## Safety

- **Risk impact:** High 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).

## Similar extensions and apps

- [Insecure Links Highlighter](https://chrome-stats.com/d/insecure-links-highlighter) — 6 users, 1.00 / 5
- [chlorine-http](https://chrome-stats.com/d/chlorine-http) — 8 users, 4.75 / 5
- [Web Safety](https://chrome-stats.com/d/web-safety) — 1 users
- [SSLeuth](https://chrome-stats.com/d/ssleuth) — 65 users
- [Security Headers Checker](https://chrome-stats.com/d/security-headers-checker) — 3 users
- [IsPwned ?](https://chrome-stats.com/d/ispwned) — 4 users, 1.00 / 5
- [LeakIX](https://chrome-stats.com/d/leakix) — 24 users, 5.00 / 5
- [moarTLS](https://chrome-stats.com/d/moartls) — 10 users, 4.75 / 5
- [Encryption Status Monitor](https://chrome-stats.com/d/encryption-status-monitor) — 1 users
- [Security Header Grader](https://chrome-stats.com/d/security-header-grader) — 2 users
- [Dependency Security Scanner](https://chrome-stats.com/d/dependency-security-scanner) — 1 users
- [Risk Alert](https://chrome-stats.com/d/risk-alert) — 1 users

---

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