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.
Mark TextArea Element value as a source.
Currently input element value attributes are marked as sources. These are stored via attributes and tainted properly.
However, TextArea Elements don't use attributes to store their content, and hence are currently not tainted.