Lookup in Dict.cn is a Chrome add-on developed by pengwenqiang that allows users to quickly look up words on the Dict.cn website. With a simple right-click, users can activate the menu option "Lookup in dict.cn" and a window will pop-up displaying the dictionary information from dict.cn.

One of the standout features of this add-on is its focus on user privacy and security. It does not require any permissions, store any information, or access any servers in the background. The source code for the add-on is also openly available on GitHub, providing transparency and assurance to users.

Another great aspect of Lookup in Dict.cn is its user-friendly design. It only activates when the user explicitly clicks on the right-click menu option, avoiding any unwanted pop-ups. Additionally, it can be used even in Chrome PDF files, making it a versatile tool for users who frequently work with PDF documents.

Lastly, the add-on offers a convenient feature for users reading PDFs. It automatically removes any punctuation marks before and after the selected word, reducing the hassle of manually selecting words while reading PDFs.

Overall, Lookup in Dict.cn is a highly recommended Chrome add-on for users who frequently need to look up words while browsing or reading PDFs. Its focus on privacy, user-friendly design, and compatibility with PDFs make it a valuable tool for enhancing the browsing experience.