Remarkable is a simple extension that automatically keeps your bookmarks clean & up-to-date.

(Other browsers coming soon - sorry!)

Running a clean will move all dead sites (e.g. non-existent pages, 404s) to a trash folder for you to review or delete.

Running a refresh will update your bookmarks to use the most recent favicon and title for each page.

During the refresh, all your bookmarks will be open (in small batches), so the process can be a bit slow if you have a large number of bookmarks.

Remarkable doesn't store any data at all.