- Added screenshot options (animations, mask) and maxDiffPixels/maxDiffPixelRatio for expect().toMatchSnapshot, plus support for anonymous snapshots
- Introduced fullyParallel test mode, per‑project grep settings, locator.highlight debugging, and Trace Viewer API request display
- Provided a dedicated Python Docker image and deprecated Python in the JavaScript Docker image, also ending WebKit support for macOS 10.15 Catalina
