GWT getting missing-plugins message

When i tried to run an GWT sample application i got a missing-plugins on firefox (or Chrome) it seems that i'm missingg something just don开发者_JAVA百科t know what to do in order to make it works...

any ideas??

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You need to install the Google Web Toolkit Developer Plugin:

In the development mode window you will find the URL for the local server. Paste this URL into Firefox, Internet Explorer, Chrome, or Safari. Since this is your first time hitting the development mode server, it will prompt you to install the Google Web Toolkit Developer Plugin. Follow the instructions in the browser to install the plugin. Once the Google Web Toolkit Developer Plugin is installed in your browser, navigate to the URL again and the starter application will load in development mode.