Hello, this morning I noticed that the Avast Online Security icon wasn't showing up in my Firefox add-ons, so I uninstalled and reinstalled it by clicking "Remove" on the add-ons list, and then I reinstalled it by going to the add-ons store, but now the add-on won't work at all, and when I click on it, the site rating won't show up. Please can you help me fix this?