Sauce Visual is a visual testing solution that can be used to automate the detection of visual changes and as a bonus, get automated functional testing out of it too. To use Sauce Visual with Screener Runner, you'll need the Screener Runner Javascript package and other prerequisites. You can use interactions provided in the Screener Runner package to perform functional testing, similar to Selenium, but with the added benefit of taking visual snapshots to ensure the page looks correct. This allows testers to save time by reducing the number of assertions needed to verify element presence, while focusing on what a user sees. With Sauce Visual and Screener Runner, you can run lightweight E2E testing across multiple browsers and screen resolutions, automating the detection of visual and functional regressions.