What if it's a browser you've never seen before?
Now, this is where things get interesting.
What can they do?
This is where you may have to go out to the App Store
and look it up.
Can it do private browsing?
All browsers will have, obviously,
web history, bookmarks, downloads, cookies.
Most of them offer autofill.
They will cache images.
They will have saved pages.
They may have offline pages--
all different kinds of things you can do.
What I recommend is, if you find a table that is not parsed,
start with history and see what you can get from there.