The following settings are for this device

Dark mode

The website in dark colors

Push messages

Receive push messages in the browser and installed web app.
You'll allow to receive push messages, when they are send for important news.
* Supported in most recent browsers, Safari for iOS excluded (for iOS (iPhone) as OSX (Mac))
* OSX (Mac) push messages are disabled by default, change this in the system preferences -> notifications to enable for the used browser.