Add training is a free Chrome extension developed by lllei. It falls under the category of Browsers, specifically Add-ons & Tools. This extension aims to provide a better practice environment for users and enhance their training experience.

With Add training, users can hide tags in Codeforces, a popular competitive programming platform. This feature allows users to focus on solving problems without being influenced by the tags associated with them. Additionally, the extension offers a quick jump feature, enabling users to easily navigate to websites like Codeforces.

Another useful feature of Add training is the ability to conveniently see your Codeforces rating. This allows users to track their progress and monitor their performance over time.

Overall, Add training is a helpful Chrome extension for those looking to improve their programming skills and optimize their training sessions. It provides useful tools and features to enhance the practice experience on Codeforces.