# Cert Timer Pro

> View days until certificate expiration on websites.

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

## Overview

- **ID:** `cert-timer-pro`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** leroy
- **Category:** privacy-security
- **Version:** 3.0
- **Last updated:** 2024-07-09
- **First published:** 2024-07-08
- **Size:** 53 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cert-timer-pro/)

## Description

Cert Timer Pro displays the remaining days until a website's certificate expires on a padlock icon in the toolbar. It highlights urgent expirations and insecure connections with a red icon.

## Rankings

- #140,475 — Overall

## 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

- [CertiMonitor Pro](https://chrome-stats.com/d/certimonitor-pro)
- [Cert Counter](https://chrome-stats.com/d/cert-counter) — 1 users
- [CertiDays Tracker](https://chrome-stats.com/d/certidays-tracker)
- [CertiCountdown](https://chrome-stats.com/d/certicountdown)
- [Expiry Tracker Plus](https://chrome-stats.com/d/expiry-tracker-plus)
- [Cert Monitor](https://chrome-stats.com/d/cert-monitor)
- [CertiStatus Plus](https://chrome-stats.com/d/certistatus-plus) — 8 users
- [Cert Reminder](https://chrome-stats.com/d/cert-reminder)
- [Certificate expiration](https://chrome-stats.com/d/certificate-expiration) — 164 users, 4.67 / 5
- [CertiWatch Plus](https://chrome-stats.com/d/certiwatch-plus)
- [Certi Watch](https://chrome-stats.com/d/certi-watch)
- [Secure CertiMate](https://chrome-stats.com/d/secure-certimate)

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