Everything in the first section works with no signal at all. Nothing here has to be downloaded, and nothing here can be deleted.
Served with the page rather than fetched afterwards, which is why it is readable before anything else has loaded.
None of this is behind an account, and none of it can be removed from here. It is what makes the app work with nothing to connect to.
Two things in the product are not on this browser, and neither of them is waiting for a download that failed.
Hazard perception clips are video and are streamed as you watch them. The 3D drives run in this browser rather than being installed into it. Neither is a file this page could list, size or remove, so it does not pretend to.
The pack above is part of the page. It is replaced when the site is deployed and not before, so it cannot go stale in this browser and there is no version of it to manage.
There is no megabyte figure anywhere on this page. A browser will not tell a site how much it has cached, and a number we cannot measure is a number we would be making up — which on a page about what you can rely on offline is exactly the wrong place to do it.
Your answers are stored separately from all of this. Clearing the site data in your browser removes them from here; an account keeps a copy elsewhere, which is the only thing an account is for.