You cannot have a multiuser iPad, but can definitely have a multiuser browser inside it.

Its name is Switch. Its multiuser capabilities are thought with security in mind, for the user and for the other users too!

There’s a guest account for extra privacy and the occasional friend that asks to have a look at the Internet.

Recurring users can use the same Switch and have each one their logins and passwords for every account on every site they visit, without other user being able to tamper with that (they are supposed to have their passwords instead).

While you are using Switch, can protect your whole session with a single password and nobody else can access the browser unless you forbid it.

The price to pay for multiuser security is US$ 0.99, € 0.79. Not that much, huh?