宅急便小幫手 is a browser add-on that provides a convenient way for customers to make purchases and payments without the need to open the 宅急便 website. With this add-on, customers can use the proxy payment feature during the checkout process. When purchasing a product and confirming the order, customers can choose to have a friend make the payment on their behalf. Upon reaching the payment page, 宅急便小幫手 will automatically pop up, allowing customers to log in or redirect to the official website for registration. For customers who are already logged in on the official website, they will be automatically logged in and their information will be displayed in the add-on's popup window. Customers can easily make proxy payments by following the instructions provided at the bottom of the popup window. Additionally, they can click on the 宅急便小 icon in the top right corner of the browser to view the step-by-step process.