ZeroBox needs JavaScript to run the tracker. Your data stays in your browser.
You can still read the home page and the guides: machines, cheatsheets, methodology, reverse shells and pentest notes.
An interactive checklist you tick off for each box you work on. Pick a target, work through the phases, and your progress is saved per machine, so you can see what is done and what is left. Commands insert your target IP and attacker values.
Want to read the phases without the app? See the pentest methodology guide.