Simplify the following text for a Grade 9 native English-speaking person.
Original: Web browsers employ a built-in web cache , but some internet service providers or organizations also use a caching proxy server , which is a web cache that is shared among all users of that network .
Simplified: Modern web browsers use a built-in web cache , but some internet service providers or organizations also use a caching proxy server . This is a web cache that is shared between all users of that network .