This module helps you to add a new feature to the magento mini cart. As you know, if a customer has several open browser tabs and adds a product to her/his cart, just the active tab mini cart will change and the other tab mini cart does not change. By this module any mini cart change will be sync in all the opened tabs.
composer require darvishani/cart-auto-load:"dev-master"
1- add auto update to mini cart
result
Config
simply you can disable this ability
Magento admin : store > configuration > sales > checkout > mini cart > auto load mini cart enable
