# HSTS Checker

> The HSTS Checker addon for Firefox is a powerful tool for ensuring secure browsing experiences. It swiftly scans websites to verify if they employ HTTP Strict Transport Security (HSTS), a crucial security measure against protocol downgrade

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

## Overview

- **ID:** `hsts-checker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** CMD368
- **Category:** web-development
- **Daily users:** 25
- **Weekly downloads:** 3
- **Version:** 1.0
- **Last updated:** 2024-04-04
- **First published:** 2024-04-03
- **Size:** 7.95 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/hsts-checker/)

## Rankings

- #22,193 — Overall
- #110 — checker

## Permissions and access

### Permissions

- `tabs`
- `webRequest`
- `webNavigation`

## 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).

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