# Cert Reminder

> Never miss a certificate expiration with CertReminder. This reliable Firefox extension constantly reminds you of the remaining days until website certificates expire.

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

## Overview

- **ID:** `cert-reminder`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** truyensex
- **Category:** social-communication
- **Version:** 3.0
- **Last updated:** 2023-09-21
- **First published:** 2023-09-20
- **Size:** 53 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cert-reminder/)

## Description

CertReminder is a reliable Firefox extension that ensures you never miss a certificate expiration. It constantly reminds you of the number of days left until website certificates expire by displaying the count on a padlock icon in the toolbar.

When there are fewer than 29 days left, the icon turns red, prompting you to take action promptly. Moreover, if the site connection is not encrypted, it shows an unlocked red padlock, signaling potential security risks.

## Rankings

- #139,387 — Overall
- #136 — reminder

## 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

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- [CertiCountdown](https://chrome-stats.com/d/certicountdown)
- [CertiDays Tracker](https://chrome-stats.com/d/certidays-tracker)
- [CertiSafeGuard](https://chrome-stats.com/d/certisafeguard) — 20 users
- [Certificate expiration](https://chrome-stats.com/d/certificate-expiration) — 168 users, 4.67 / 5
- [CertiMonitor Pro](https://chrome-stats.com/d/certimonitor-pro)
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- [Certi Watch](https://chrome-stats.com/d/certi-watch)
- [Secure CertiMate](https://chrome-stats.com/d/secure-certimate)
- [CertExpiry Alert](https://chrome-stats.com/d/certexpiry-alert) — 2 users

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