Why won't Web Apps install after I click intall in Firefox?

Question

I am trying to install a couple web apps (gmail, facebook). I get the prompt in Firefox to install them. I click install and nothing happens. Am I forgetting to do something?

Answer 1

They won't give you a message like "The app has been successfully installed" or anything like that. But you can see these apps in the top panel, under the envelope button. Please check whether its there, if not, then they have not been installed. This is how my apps look after I have installed them: