Activate the Dark Theme on the Edge browser.
The following article will show you how to install and remove themes on Microsoft Edge Chromium. So users need to install additional support tools and revise some settings on the browser to install themes on Chrome Store or from outside. The current Microsoft Edge Chromium browser has just released a trial version and has not completed the features yet, so users cannot install the theme nor the app from the Chrome Web Store into Microsoft Edge Chromium.