LeetCode Helper Extension is a Chrome add-on by khirayama designed to enhance the user experience on the LeetCode platform. Currently, the extension is tailored for Mac OS users, offering a set of convenient keyboard shortcuts to streamline coding tasks.

With LeetCode Helper Extension, users can utilize key combinations like `ctrl + ENTER` to swiftly run their code, `ctrl + shift + ENTER` to execute example test cases, and `command + ENTER` to submit their solutions effortlessly. Additionally, shortcuts such as `ctrl/command + t` allow users to focus on test cases, while `ctrl/command + c` directs the attention to the code editor, enhancing productivity and efficiency.