Update the Missing Plugin page for FF5 support

Review at http://gwt-code-reviews.appspot.com/1465807

Review by: codefu@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10405 8db76d5a-ed1c-0410-87a9-c151d255dfc7
1 file changed