Running GWT + App Engine in non-development mode

I'm using Google plug-in for Eclipse and it seems like there's only dev mode available. How can I run 开发者_运维知识库my GWT application on App Engine locally in native (non-development) mode, so I can test in browsers that don't have GWT plug-in?

1. Compile your GWT project. This should produce JS and html files in the WEB-INF folder.
2. Create an App Engine run configuration an run it.

GWT Compile your project. Go to your war directory of your project. Open the index.html file with your browser of choice. I believe this should work.