After using it it seems to have too many false positives. I'm having to scroll through my 4000+ bookmarks and check every red one to make sure it's not deleting anything it shouldn't. E.g. it assumed youarelistening.to was invalid but there's nothing wrong with that link.

Also, you must make sure you are using a vpn otherwise it will delete anything like torrent bookmarks which don't connect without it.

At this moment I can't see the button I will push when I finally want to delete all the remaining red ones.