# CertMonitor

> Monitor website certificate expiration dates effortlessly with this extension.

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

## Overview

- **ID:** `certmonitor`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Crickex
- **Category:** feeds-news-blogging
- **Daily users:** 1
- **Version:** 3.0
- **Last updated:** 2024-02-12
- **First published:** 2024-02-12
- **Size:** 53 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/certmonitor/)

## Description

CertMonitor is a user-friendly Firefox extension that keeps tabs on the expiration date of the current website's certificate. It offers users a convenient way to stay informed about the remaining validity period of certificates.

## Rankings

- #93,780 — Overall
- #124 — monitor

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `<all_urls>`
- `tabs`

## Safety

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

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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

- [Cert Monitor](https://chrome-stats.com/d/cert-monitor)
- [Cert Validity Monitor](https://chrome-stats.com/d/cert-validity-monitor) — 1 users
- [CertTracker](https://chrome-stats.com/d/certtracker)
- [Secure CertiMate](https://chrome-stats.com/d/secure-certimate)
- [Cert Expiration Tracker](https://chrome-stats.com/d/cert-expiration-tracker) — 20 users, 5.00 / 5
- [Certi Watch](https://chrome-stats.com/d/certi-watch)
- [CertiSafeGuard](https://chrome-stats.com/d/certisafeguard) — 20 users
- [CertiCountdown](https://chrome-stats.com/d/certicountdown)
- [SSL Watcher](https://chrome-stats.com/d/ssl-watcher) — 13 users
- [Cert Reminder](https://chrome-stats.com/d/cert-reminder)
- [CertExpiry Alert](https://chrome-stats.com/d/certexpiry-alert) — 2 users
- [CertiMonitor Pro](https://chrome-stats.com/d/certimonitor-pro)

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