See http://code.google.com/webtoolkit/gettingstarted.html

It gives instructions about how to get the prompt to install the Firefox plugin.

Thanks. But this is exactly what I did, and when it fails. You go from Dev Mode, to launch the brower. It then takes you to the "Missing Plugin" page. You click on the button in the top right-hand corner, and normally it installs the plugin. But now it says that the plugin is incompatiable with FireFox

Has anyone tried uninstalling Firefox 3.6.8 and trying an earlier version?

Thanks. But this is exactly what I did, and when it fails. You go from Dev Mode, to launch the brower. It then takes you to the "Missing Plugin" page. You click on the button in the top right-hand corner, and normally it installs the plugin. But now it says that the plugin is incompatiable with FireFox

Has anyone tried uninstalling Firefox 3.6.8 and trying an earlier version? Or creating an XPI of the plugin for Windows 7 (64bit)?

Hi richkatz,

I'm on FF3.6.2 and today, I encounter the same problem.

I got the solution by opening the download page in another tab. Then the firefox message switched from "Look for Plugin" to "Autorise FF to install the plugin".

Here is the URL of my new tab, hoping that it works for FF3.6.8 : https://dl-ssl.google.com/gwt/plugins/firefox/gwt-dev-plugin.xpi

Seeya! ;)

You can find the GWT Developer Plugin for your Browser like Internet Explorer(32-bit and 64-bit), Firefox, Chrome, Safari etc on following link:

http://gwt.google.com/missing-plugin/MissingPlugin.html

(you may click on the link "plugins for other systems" for other browsers.)