Flags on bookmarks

Hello.

I would like to suggest to add flags to bookmarks, so that they can be flagged to indicate a to-read, for instance. I have a lot of bookmarks, including a lot of articles. The articles I’ve read I organize into folders by topic, but the to-read articles I currently collect in one big folder, so as not to overdo it with the folders (like organize my to read list in the same way as my read list, or have a to read under each topic). This becomes an unorganized mess, and so it would be muuch more useful to simply have the option to flag an article so as to indicate that I still need to read it.