Simplify the following text for a Grade 17 native English-speaking person.
Original: The Sandbox Team is said to have `` taken this existing process boundary and made it into a jail '' ; for example , malicious software running in one tab is supposed to be unable to sniff credit card numbers entered in another tab , interact with mouse inputs , or tell Windows to `` run an executable on start-up '' and it will be terminated when the tab is closed .
Simplified: The Sandbox Team is said to have `` taken this existing process boundary and made it into a jail '' ; for example malicious software running in one tab is unable to sniff credit card numbers , interact with the mouse or tell `` Windows to run an executable on start-up '' and will be terminated when the tab is closed .