During December 2024, Emera focused on enhancing Unicode reliability in the mozilla/rhino repository by addressing a critical bug in the TokenStream parser. Leveraging expertise in Java and JavaScript, Emera corrected multibyte character length calculations across string literals, template literals, XML literals, and multiline comments, ensuring accurate cursor and tokenEnd updates. This work involved developing comprehensive tests to validate edge cases and regression scenarios, strengthening the parser’s handling of complex Unicode input. By improving string manipulation and parser development, Emera’s contributions reduced the risk of subtle tokenization errors, resulting in more robust Unicode support for downstream JavaScript applications.