The add-on offers several useful features. Users can specify a problem tier range and the add-on will randomly select a problem within that range. Additionally, if the user enters their BOJ ID, the add-on will eliminate problems that have already been solved by that ID. This allows users to focus on unsolved problems and improve their problem-solving skills.

In the latest version 3.0, BOJRandomDefense has added the ability to select random problems from Programmers as well. This expands the add-on's usefulness to a wider range of users who are also interested in solving problems on the Programmers platform. Version 2.0 introduced detailed tier level options, allowing users to fine-tune their problem selection. It also added the option to only include Korean problems, providing users with a more tailored experience.

BOJRandomDefense is powered by the Solved.ac API, ensuring accurate and reliable problem selection. With its intuitive interface and helpful features, this Chrome add-on is a valuable tool for those looking to enhance their problem-solving abilities on Baekjoon Online Judge and Programmers.