It worked like this: after opening a link with a ?gwt.codesvr=127.0.0.1:9997
after a suggestion GWT plugin was downloaded and installed. But I\'ve just got this
I think the easiest way to install the plugin is, to load the google chrome Browser with the
flag –enable-easy-off-store-extension-install
With this flag you disable this "feature".
For more informations, see here
Chrome 21 changed the policy on installing extension to chrome to "only from chrome web store".
This is already addressed in the GWT contributer group and will be fixed within a week or two.
See discussion (with workaround) from the contributer list: https://groups.google.com/group/google-web-toolkit-contributors/browse_thread/thread/24eaf2956ca4a212#
Go to chrome://chrome/extensions in your browser and drag and drop the file you downloaded (should be named google-dev-pluggin.crx I think)