Very fast checker for 404 and other types of book marks, and very easy to remove ones that are no longer valid.

Works great for me!

Easy decluttering for my tons of bookmarks. Awesome!

This is EXACTLY what I was looking for. Thanks!!

Коректно удаляет старые закладки и на андроид работает молодцы

отлично, но есть но - страницы с авторизацией помечает как 404

This is a very useful add-on for Firefox! I have an extensive collection of bookmarks that I had been accumulating for literally decades and the thought of manually going through them for validation was just daunting. This saved me potentially weeks of work cleaning up expired bookmarks!

Thank you very much, Mr. Schuster!

扫描失效的收藏 很方便 还会检索收藏中部分报错的给确认

Does what it says on the tin. Thank you, Mr Schuster!

Works great! Efficiently deleted 20+ years' worth of old, expired bookmarks.

Wonderful! have been looking for something like this for years. 25 years of junk cleaned out.

Чудесно! Все працює!

Is saving me a lot of time, easy to check the links before marking for deletion, then 1 click and all marked links are deleted. A good tool to use. Nice :-)

This bookmark add-on was exactly what I was looking for...thanks! An additional feature for a whitelist for bookmarks to be excluded from future scans would be appreciated.