Mobile Mode on Web Browsers

How would I go about forcing the the testing software to click the Mobile mode on Chrome or for any other web browser? I do most mobile testing from the web browser because I can use multiple devices to test web apps with, so was hoping that I could do the same thing with this Testing software.

@christopherh,

You can find the solution at my old post:

@duyluong

I followed the steps, but still can’t get the browser to start in Mobile mode. Can you explain how to add the line to the Test case, or is it possible to have the mouse click into the developer area and click Mobile Mode.

I am suffering from the same problem.
I hope it will be a clue to the solution, but when I upgrade the Chrome driver to Ver90, the PC site will be displayed.
In the case of Ver90 or earlier, it was displayed on the mobile emulator.