Hi, Ghot,
Do you have the latest active x. I gave that link specifically to update the active x plugin of adobe. This is not available in the general download.
Try to reset firefox. It will solve most of the problems, as firefox fix itself says. I think you know how to reset firefox. It will auto update, if you click about firefox menu in the Help field.
Adobe flash player's latest plugin have been updated regularly so also active x. This is shown as two items in the Avast Softfare updator tool in the avast free version.