从 V2EX 来支持的（用官方工具从 chrome 迁移了好几次都失败orz，非常好用，有助于减少再也不读书签（逃

Very helpful extension to reduce the amount of useless bookmarks and do this through a very efficient way ( by show a page of one of your bookmarks and ask you whether delete it or remain it). Also provide tons of customizable choices to meet your requirements.