When true, the loader will bypass the cache for all inspected page
resources loaded before the load event is fired. The effect is similar
to pressing Ctrl+Shift+R in the inspected window or within the Developer
Tools window.
If specified, the script will be injected into every frame of the
inspected page immediately upon load, before any of the frame's scripts.
The script will not be injected after subsequent reloads-for example, if
the user presses Ctrl+R.
If specified, the string will override the value of the User-Agent HTTP
header that's sent while loading the resources of the inspected page. The
string will also override the value of the navigator.userAgent property
that's returned to any scripts that are running within the inspected page.