Google’s Chrome web browser for desktop allows you to toggle experimental features by entering chrome://flags into the address bar to view a list of flags which you can disable or enable. Now you can do the same thing with an Android device.
Just download the latest Chrome Beta from the Play Store and type chrome://flags to see the list of available options.
Android Police has a more detailed list of the flags that are currently available. WebGL support is probably the biggest change, since it adds experimental support for 3D graphics in web apps.
Unfortunately I wasn’t able to view the full list myself, because Chrome Beta crashes every time I try to load it on my HTC One X smartphone. This is beta software, after all.