The Leetcode Difficulty Rating Chrome add-on by boenshao is a useful tool for developers looking to get a more precise rating for Leetcode problems. This add-on supports both leetcode.com and leetcode.cn platforms, allowing users to easily access rating data for a wide range of problems.

With this add-on, users can replace Leetcode problem's difficulty with a more accurate contest rating. The add-on preserves the green/yellow/red text color that indicates the official difficulty, making it easy for users to identify the level of challenge for each problem.

It's worth noting that problems in the 1st-62nd weekly contests and problems that did not come from contests are labeled as "N/A" by default. However, users have the option to change this setting in the extension popup.