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.
2,718 users
Error 404 Wayback Machine
Checks every 404 pages. If an archive exists in archive.org, a banner is displayed to open this archive.
252 users
Forecastfox (fix version)
Get international weather updates (via AccuWeather.com) displayed right in Firefox with this highly customizable extension.
18,564 users
Download Manager (S3)
View and manage downloads from a tidy status bar.
61,644 users
Broken Link Checker
A SEO tool to find broken (404) and redirected (301, 307, 308) links in all frames
2,112 users
Wayback Machine
Welcome to the Official Internet Archive Wayback Machine Browser Extension! Go back in time to see how a website has changed through the history of the Web. Save websites, view missing 404 Not Found pages, or read archived books & papers.
30,423 users
Ayudante de Tramites
Auto Recarga las paginas de tramites de Apostilla, Pasaporte, Legalizacion y Antecedentes Penales cuando aparecen los errores 404, 500, 502 y 504.
186 users
1 user
1 user
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65 users
Link Roamer
A browser extension for gathering, organizing, and inspecting all the links on a web page. Find broken 404 links on a web page too!
14 users
0 users
Custom 404 Page Notifier
The "Custom 404 Page Notifier" Firefox addon is your go-to tool for staying informed whenever you encounter a dead end on the web. With its intuitive interface and seamless integration, it alerts you whenever a website's page is not found
1 user
44 users
0 users
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JavaScript Errors Notifier
Notifies JavaScript errors by icon in toolbar bar or notification popup GitHub → https://goo.gl/RBcFK8 Test page → https://goo.gl/IEXS2y
440 users
6 users
13 users
0 users
27 users
Megabonus - cash back up to 40%
Megabonus is a reliable and convenient cash back program that allows saving on online purchases
2,318 users
0 users