豆瓣图书-查二手书价格 by Lynwee

Required permissions:

• Access your data for book.douban.com

Optional permissions:

• Access your data for book.douban.com
• Access your data for search.kongfz.com
• Access your data for api.taoshu.com
• Access your data for apiv3.manyoujing.net

Data collection:

• The developer says this extension doesn't require data collection.