I click on both the icon in the dock and in the apps folder. When I click on the icon in the dock it bounces a couple of times and then nothing, it doesn't open and no white dot appears like they do on open apps in the dock. I am running the latest Mac OS. After having this happen I updated my software and downloaded at new version of Firefox off the web but the same thing happens. I have not downloaded anything in the last week and have been using firefox up until today.