Error 404 Wayback Machine
Checks every 404 pages. If an archive exists in archive.org, a banner is displayed to open this archive.
Error 404 Wayback Machine Add-on
Error 404 Wayback Machine is a Firefox add-on that checks for error codes 404, 408, 410, 451, 500, 502, 503, 504, 509, 520, 521, 523, 524, 525, and 526. If archived versions of the URLs are available, it displays a banner to open the archive.
Add-on stats
Weekly download count: 9
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- webRequest
- webRequestBlocking
- http://*/*
- https://*/*
- <all_urls>
Size: 274.82K
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
Error 404 Wayback Machine detects error codes 404, 408, 410, 451, 500, 502, 503, 504, 509, 520, 521, 523, 524, 525, and 526 and checks to see if archived versions of the URLs requested are available. If they are, a message will be displayed offering the opportunity to view the archived version. To test this try going to: https://www.whitehouse.gov/the-record/climate
User reviews
Use the official Internet Archive extension instead:
https://addons.mozilla.org/en-US/firefox/addon/wayback-machine_new/
by Firefox user 18389199, 2024-04-26
Gan Jing World is a clean, curated universe and a dynamic, overlapping network of integrated platforms and services. ==> https://www.ganjing.com
by GanJingWorld, 2022-12-23
by Th3Kay242, 2022-12-23
Add-on safety
Risk impact
Error 404 Wayback Machine requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Error 404 Wayback Machine is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
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