A web browser with dynamic data-flow tracking enabled in the Javascript engine and DOM, based on Mozilla Firefox (https://github.com/mozilla/gecko-dev). It can be used to identify insecure data flows or data privacy leaks in client-side web applications.
Playwright v1.39.0 has dropped, with updated browser patches:
https://github.com/microsoft/playwright/blob/release-1.39/browser_patches/firefox/UPSTREAM_CONFIG.sh
Update to Firefox commit: fdbb85992450ee14d23efe08c0dd655eedab0e1d