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.

404 Bookmarks - A Lifesaver for your Bookmarks

'404 Bookmarks' is a simple yet powerful Firefox add-on designed to streamline and cleanse your bookmarks. The extension checks your bookmarks for any that return 404 or other HTTP error codes, indicating expired or broken bookmarks. Notably, it also categorizes other kinds of HTTP errors into a separate 'Other Bookmarks' section, enabling users to manually check these links before deletion. It's important to note that deleting bookmarks via this extension is irreversible. The tool may encounter issues with Ad-blockers like Adblock Plus or uBlock, consider disabling these temporarily if detectable websites are shown as not working.
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View on Firefox Browser Add-ons

Add-on stats

Users: 2,670
Rating: 3.88
(111)
0.01
Version: 1.8resigned1 (Last updated: 2024-04-25)
Creation date: 2017-02-03
Weekly download count: 27
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood:
Low risk likelihood
Manifest version: 2
Permissions:
  • bookmarks
  • <all_urls>
Size: 19.53K
URLs: Website

Ranking

# 1,733 ▲ 6
Other rankings
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Other platforms

Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary

Analyze keywords

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.

IMPORTANT This extension might not work correctly in some situation with (ad)blockers like uBlock or Adblock Plus. Try disabling them temporarily when otherwise reachable websites show up as not working.

Expired bookmarks vs "other bookmarks" For expired bookmarks the page returned a 404 error page, like you would often see when visiting a website that can't be found. You can be relatively sure that this is detected correctly by this extension. You should always manually check the links before deleting the bookmark, this operation can not be undone.

The category "Other bookmarks" contains all other kinds of HTTP errors, like 403 (Forbidden) or 503 (Service Unavailable), but can also indicate that a DNS lookup for this page failed. You should always make sure that these links are actually broken before deleting them.

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Effectively identifies dead links in bookmarks
  • Quickly processes a large number of bookmarks
  • Simple installation with minimal setup required
  • Useful for cleaning up bookmarks periodically
Cons
  • Lacks a user interface and instructions
  • No options to pause or slow down the search process
  • May consume too much resources during operation
  • Incompatibility issues with some versions of Firefox, especially on mobile
Most mentioned
  • Absence of a user interface or instructions for usage
  • Effectiveness in identifying dead links
  • Performance issues leading to browser crashes
  • No additional features or settings available
User reviews
Couldn't be simpler. I installed, ran the extension from the extensions overflow menu, and it sorted through my 90,000 bookmarks in a fairly reasonable time. Dang there's a lot of dead sites :(, I am still confirming most of them (and will be for a while!) but it makes me sad to see so many resources and websites gone.
by MB, 2025-01-22
これは便利！
by nool, 2024-12-31
No user interface, no instructions, absolutely nothing to guide use of this extension, rendering it useless. I'd like to know how those users who are giving high ratings managed to use this.
by Firefox user 14405590, 2024-12-09
View all user reviews

Add-on safety

Risk impact

404 Bookmarks requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

404 Bookmarks has earned a fairly good reputation and likely can be trusted.

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