In the latest Creative Cloud release of Photoshop, switching from Photoshop to Chrome with
Command + Tab doesn’t work. As a favor for people googling this, a workaround is to set Photoshop in “Full Screen Mode”. Tap
F twice, or pick View → Screen Mode → Full Screen Mode. Palettes are hidden by default in this screen mode, but you can unhide them by tapping
Update: Another excellent workaround is to use Sketch.