Qidian Mark is a free Chrome add-on developed by ruanwenfeng0. It falls under the category of Browsers and specifically belongs to the subcategory of Add-ons & Tools. This add-on provides a convenient and quick way to manage your book blacklist on the Qidian website.

With Qidian Mark, you can easily mark novels that you don't want to read. When you hover your mouse over a novel's title, a button will appear, allowing you to either remove the novel from your blacklist or add it to your blacklist.

This add-on is a useful tool for users of the Qidian website who want to keep track of their preferred novels and avoid wasting time on novels they are not interested in. Qidian Mark simplifies the process of managing your book blacklist, making it easier to curate your reading list according to your preferences.