BOJ Addon is a free Chrome extension developed by 7nbaek. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension is designed to enhance the experience of solving problems on the BOJ Online Judge website.

With BOJ Addon installed, users can enjoy several convenient features. Firstly, it allows users to code directly without the need for an Integrated Development Environment (IDE). This streamlines the coding process, making it easier and more efficient.

Secondly, users can verify if their code is correct directly on the problem page. This feature saves time by eliminating the need to switch between tabs or windows to check the correctness of the code.

Additionally, BOJ Addon enables users to add custom test cases to solve problems that are not available on the BOJ platform. This empowers users to practice and expand their problem-solving skills beyond the existing problem set.

Lastly, the extension provides the option to switch between dark mode and light mode themes in the editor. This allows users to customize their coding environment according to their preferences.

BOJ Addon is a valuable tool for those who frequently solve problems on the BOJ Online Judge platform. Its convenient features enhance the coding experience and provide additional flexibility for problem-solving. Please note that this extension requires the use of JavaScript.