# Last-Modified Detective

> Find out when a page was really last updated. Reads the server's Last-Modified header and shows the date plus how long ago it was, along with other response headers, and jumps to the Wayback Machine.

Canonical page: [https://chrome-stats.com/d/last-modified-detective](https://chrome-stats.com/d/last-modified-detective)

## Overview

- **ID:** `last-modified-detective`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** Naththib
- **Version:** 1.5
- **Last updated:** 2026-07-15
- **First published:** 2026-07-12
- **Size:** 30 KB
- **Data as of:** 2026-08-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/last-modified-detective/)

## Permissions and access

### Permissions

- `activeTab`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High 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 is not longer available in the store

## Similar extensions and apps

- [Wayback Archive Check](https://chrome-stats.com/d/wayback-archive-check) — 10 users
- [Last Modified](https://chrome-stats.com/d/last-modified-extension) — 5 users
- [Offline Page Expiry Checker](https://chrome-stats.com/d/offline-page-expiry-checker)
- [PastPage: Query 10+ Web Archives](https://chrome-stats.com/d/pastpage-query-10-web-archives) — 12 users
- [Out-of-date Checker](https://chrome-stats.com/d/out-of-date-checker)
- [Wayback Machine Searcher](https://chrome-stats.com/d/wayback-machinesearcher) — 30 users
- [Wayback Machine Searcher](https://chrome-stats.com/d/waybackmachinesearcher) — 42 users
- [Wayback Machine Searcher](https://chrome-stats.com/d/wayback-machine-searcher) — 33 users
- [Archive Page](https://chrome-stats.com/d/archivepage) — 25 users
- [LastModifiedInfo](https://chrome-stats.com/d/lastmodifiedinfo) — 123 users, 2.73 / 5
- [Save To The Wayback Machine](https://chrome-stats.com/d/save-to-the-wayback-machine) — 204 users, 4.67 / 5
- [WaybackMachine Cache Grabber](https://chrome-stats.com/d/waybackmachine-cache-grabber) — 4 users

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