Chrome has implemented something similar: http://blog.chromium.org/2011/03/mini-newsletter-from-your-google-chrome.html
|Feature users and use cases=Use cases with '''proposed interactions below emphasized''':
# User has a an out of date plugin that is used on the site the user is visiting
#* '''User can run plugin after clicking to activate it'''
# User has a plugin that mozilla has remotely required to be click to play because the plugin is being widely exploited, no update available