Microsoft released a new update for Microsoft Edge (Chromium) for Android in the Beta channel. The latest version 45.06.24.5042 finally adds the hidden flags page to the browser. Now, with this update, you can turn ON the experimental features not yet part of the browser by default.
To try out the experimental features of Microsoft Edge, you should be part of the Beta program, which is currently not accepting new registration.
If you are having the Chromium Microsoft Edge browser on your Android device, and if you are already part of the Beta testers, you can now experience the browser experimental features not yet part of the browser by default.
To access the experimental features, upgrade your browser to the latest version (45.06.24.5042, or higher) and navigate to the flags page by typing edge://flags in the address bar. Only a limited number of experimental features currently available.
While you try out the experimental features from the edge://flags menu, note that the features are not yet properly tested by Microsoft and may contain any major or minor bugs.