Google has followed the Chrome browser for Windows 10 and macOS has started testing the dark theme for smartphones. Android Chrome OS 73 beta already supports this mode.
As the 9to5 Google authors discovered a new feature, the dark theme for the experimental browser is in very, very, very early stage of development. It only manifests itself in the popup window when long clicking on the link or image and only if the Android Pie theme for the developers is set to Always On. Moreover, on a gray background, the text sometimes remains black and difficult to see.
In the future, in the dark theme of the browser should appear and other changed elements, the menu and the general darker color. While there is no guarantee that the function will come out of the test phase, but you can still hope for it. The dark theme will be one of the most prominent features of the next version of Android.