Should I use GUID in browser database IndexedDB ?

Question

We are implementing offline capability for user. If user get offline they will be able to use our site. So we are storing the data in Indexed DB, that is browser database, containing 15 tables.

 

Tables containing auto incrementing primary key,

 

For that Database -

Should I use GUID for having unique primary key entire the database and server too?

What is the benefits of using GUID?

It's advantages and disadvantages?