Worked on enhancing PDF extraction capabilities in the open-webui/open-webui repository by addressing cross-browser compatibility issues, particularly for Safari. Developed a Safari-specific polyfill that adds async iteration support to the ReadableStream prototype only when necessary, ensuring seamless PDF extraction in environments lacking native support. This targeted approach minimized the code footprint and avoided impacting browsers where the feature already exists. The solution was implemented using TypeScript and focused on front end development, specifically PDF handling. By improving the stability of the PDF extraction workflow, the work reduced potential user-facing issues and aligned the pipeline with modern browser standards and expectations.