With this PrestaShop addon you will be able to log in to your online store as a any customer you want. Module allows to quickly log in with one mouse click. You don't have to know user password - just click - and you will be logged as any customer from your shop.
Module creates special button near each customer account on customers list (in back office) - if you will click on it - you will be automatically redirected to shop and you will be logged as this customer.
more informations about this module you can find on module page that is available here:
You can find there only valuable solutions for your e-commerce shop based on PrestaShop engine. Search the best plugin for your store that will meet your requirements and just use it.