Google Chrome 38 introduced the new \"Device Mode & Mobile Emulation\" functionality in devtools. In addition to choosing a device for emulation, it is also possible to
It looks like it's coming soon to Selenium (C#). The commit was on 01/28/2018:
https://github.com/SeleniumHQ/selenium/blob/ef156067a583fe84b66ec338d969aeff6504595d/dotnet/src/webdriver/Chrome/ChromeNetworkConditions.cs