During February 2025, Paul Upfold enhanced the SeleniumHQ/docker-selenium repository by addressing a reliability issue in Dockerized Selenium trust stores. He improved the add-cert-helper.sh script using shell scripting and Docker, implementing unique alias generation for each certificate to prevent overwrites. This change ensured that all certificates were consistently added to the trust stores of Chrome, Firefox, and other browsers within the containerized environment. By resolving the problem of missing certificates, Paul reduced test flakiness and improved CI stability. His work demonstrated a focused application of scripting and cross-browser compatibility, contributing depth to the project’s automated testing infrastructure.