Brandon Rose contributed to the zen-browser/docs repository by addressing a critical issue in the browser build documentation. He identified that the documented build command did not match the actual workflow, which led to user confusion and setup errors. By updating the instructions from 'npm build' to 'npm run build' using Markdown, Brandon ensured that new users and developers could follow the correct process, reducing onboarding friction and support requests. His work focused on documentation accuracy and process validation, demonstrating attention to detail and collaboration with other teams. The update improved the overall quality and reliability of the build documentation.