Show HN: BrowserUp Proxy-Network Traffic Testing for Selenium WebDriver (FOSS)

The BrowserUp Proxy is a free tool for web application testing that lets you test and manipulate network traffic. It works well in conjunction with Selenium WebDriver, or with any other browser automation technologies like cypress.io.

For example, you can assert that a particular request happened and had a certain response code. Typically it is used to fill gaps in what Selenium WebDriver is able to see and test.