Whether the target has an attached client.
Whether the target has access to the originating window.
Frame id of originating window (is only set if target has an opener).
Opener target Id
Provides additional details for specific target types. For example, for the type of "page", this may be set to "prerender".
List of types: https://source.chromium.org/chromium/chromium/src/+/main:content/browser/devtools/devtools_agent_host_impl.cc?ss=chromium&q=f:devtools%20-f:out%20%22::kTypeTab%5B%5D%22