How do I turn haptic feedback on or off?

Haptic feedback is the light vibration you feel when you tap buttons and complete actions in Playbox, and it is controlled by one switch. Open Settings and find Haptic feedback, described as vibration on taps and actions. Turn it off if you find the buzzing distracting, or back on for tactile confirmation. When you switch it on you get a short pulse confirming it is active.

The setting belongs to the device you are using, so turning it off on your phone changes nothing for other devices or other people. Haptics need hardware support, so they work on phones and are simply ignored in a desktop browser.