Why the blender browser plugin is not updated? You can create blender games and make it run on browsers using Blender Browser Plugin. Just wanted to know why the browser plugin is not maintained? If it is available, it will make a huge platform for developers.
As an alternative.  You can also have a look at blend4web which can directly export to an HTML file and since it uses WebGL, no browser plugin is needed.   It can also export to a more programmer oriented format for use with some of their other tools.

So far as I know, it is not yet capable of using BGE logic bricks however b4w is being updated regularly and can already be used to make really nice looking browser games.  There is also a lot of documentation available so getting started should not be too difficult.

https://www.blend4web.com/en/

Here is a BA.org thread that is currently being maintained by an employee of blend4web  http://blenderartists.org/forum/showthread.php?333214-Blend4Web-a-3D-web-framework-for-Blender-artists