自动为Pixiv收藏夹内图片打上已有的标签，并可以搜索收藏夹
Well, the script searches both your custom tags and author tags. If you would like filter out works of a specific custom tag, there is an official filter by accessing https://www.pixiv.net/users/{YOUR ID}/bookmarks/artworks/{YOUR CUSTOM TAG}.
If I did not hit the point, you might open an issue on GitHub, where I could reply to your question sooner.
功能强大 非常好用
Is it possible to search custom bookmark tags with this script (instead of author tags)?