# 404 Bookmarks

> With this extension you can find expired bookmarks and remove them easily. You can find all kinds of broken bookmarks, like pages that return 404 (Page not found) or other HTTP errors.

Canonical page: [https://chrome-stats.com/d/404-bookmarks](https://chrome-stats.com/d/404-bookmarks)

## Overview

- **ID:** `404-bookmarks`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Tom Schuster
- **Category:** bookmarks,other
- **Daily users:** 2,236
- **Weekly downloads:** 11
- **Rating:** 3.90 / 5 (115 ratings)
- **Version:** 1.8resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-02-03
- **Size:** 19 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/404-bookmarks/)
- **Website:** [https://github.com/evilpie/404-bookmarks/](https://github.com/evilpie/404-bookmarks/)

## Description

### 404 Bookmarks Chrome Extension

The 404 Bookmarks extension helps users manage and clean their bookmarks by detecting expired and broken links. It scans bookmarks to identify those leading to pages returning HTTP 404 errors (Page Not Found) or other HTTP errors such as 403 (Forbidden), 503 (Service Unavailable), or DNS lookup failures.

Users can quickly find and remove expired bookmarks, keeping their bookmark collections up-to-date and clutter-free. The extension warns users to manually verify links before deleting, as deletions cannot be undone. For best functionality, users should temporarily disable ad blockers like uBlock or Adblock Plus if websites are incorrectly shown as broken.

This extension provides an efficient way to maintain bookmark quality, improve browsing experience, and avoid frustration caused by broken links.

## Rankings

- #2,052 — Overall
- #64 — Bookmarks
- #321 — Other extensions
- #6 — bookmarks
- #8 — bookmark
- #29 — error

## Permissions and access

### Permissions

- `bookmarks`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low 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).

## Review summary

Users praise 404 Bookmarks for reliably finding many dead links, simplicity, and ability to handle large bookmark sets for cleanup. Repeated complaints are lack of a visible UI/instructions, no pause/stop or filtering options, minimal output (no URL/path/export), and resource/performance impact during long scans.

### Pros

- Effectively finds and lists dead/404 bookmarks (many users found large numbers of expired links)
- Works on large bookmark collections (users reported scanning thousands to tens of thousands)
- Very simple/minimal to use — many called it easy and quick to run
- Useful for periodic cleanup (including use on TorBrowser)

### Cons

- No clear user interface or instructions — several users couldn't find how to run it or where controls are
- No processing controls (no pause/stop), and no filters or settings to refine scans
- Very bare‑bones output — missing features such as showing bookmark URL/path, export (CSV), or additional search options
- Can consume noticeable resources and slow Firefox during large scans

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- [Bookmarks clean up](https://chrome-stats.com/d/bookmarks-clean-up) — 9,366 users, 4.30 / 5
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- [Temporary Bookmarks](https://chrome-stats.com/d/temporary_bookmarks) — 34 users, 5.00 / 5
- [One Page Favorites](https://chrome-stats.com/d/one-page-favorites) — 50 users, 5.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/404-bookmarks)