kindle.aijly.com/storage.html | asks the browser what it can remember, and prints the answers on this page
This page looks at the browser it is running in. No tools are needed: the answers appear below in plain text, so they can be read off the e-ink screen. The user agent string is the important one - it says which engine the browser is, and therefore what it should be capable of.
1. Look at the two "visits" numbers below.
2. Press Menu, then Reload. Come back to this page.
3. Did the numbers go up? Then the browser keeps data between page
loads. Did they go back to 1? Then it does not even keep it across a
reload.
4. Now press Home, open the browser again, and load this page once
more. Numbers still climbing means the browser writes to disk and keeps it
whether or not the browser was ever closed. Numbers back at 1 means the
store is thrown away as soon as the browser is not the active application.
"js" below is only a self-check: if it does not say "running", this page is not executing JavaScript at all and every other answer is meaningless.
If this line is still here when you read the page, the browser ran no JavaScript: everything below is stale text.
Running the checks...
Tests: storage.html (this page) · offline test · cache test · back to page one