Unlike on Windows, applications won’t take over existing file extensions during the installation process — they’ll just appear as an option after you install them.To set your default desktop applications for actions such as Web Browser, Email, or Video, open the System Settings window from the panel.
By default, Ubuntu will ask you what application you want to use when you insert a removable media device.
You can change this – for example, you can have Rhythmbox automatically open and play audio CDs when you insert them.
Otherwise I'll be forced to stop using Firefox as this is too much of an extra hassle to have to deal with.
Also when Updated to the latest version of flash player it did not rectify the issue.
Select the Details icon in the System Settings window.