Furthermore, full screen, maximised browser is the default and how the customer will see the page. So you want your debug tools in one place and your target bro

Furthermore, full screen, maximised browser is the default and how the customer will see the page. So you want your debug tools in one place and your target browser experience in its own window on its own screen. This is totally valid 1366*768 is probably the better target resolution for regular sites. You also need a real phone to develop on too. I do agree with the author but not all use cases are the same. You could not apply this workflow to live editing of a football match where a gallery has scores of monitors. Work is also collaboration and two monitors helps. You can explain things in a show and tell.