Network throttling with chrome and selenium

Question

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

Answer 1

No, it is not possible to control Network Connectivity Emulation through Chrome preferences or command-line arguments. Network Connectivity Emulation is part of the build-in Chrome debugger. One way way in solving this is to control the debugger. This can be done via an extension or by directly controlling the debugger, see explanation. However, this will not work with WebDriver. The reason for this is that there can only be one "debug" session and WebDriver is already using it, see explanation. Since there is no public interface, there is also no way to control it via WebDriver.

For Device Mode & Mobile Emulation which is also part of the build-in debugger, there is a public interface (details), and thus can be controlled. This can be done through WebDriver Capabilities. Two options 1) Specify a device name 2) Enter your own parameters (limited).