Using Mozilla Firefox as my default browser, when I open up the Adobe Flash Preferences App from the Linux menu, and check (Advanced)(Updates) and click on the (Check Now) button.
This action used to open up a new tab on Firefox, when it was already open, and go to the appropriate page at adobe.com to check my flash version.
When Firefox was not already open it would launch Firefox and go to the appropriate page at adobe.com and check my flash version.
Now, it launches a new instance of Firefox to a blank page.
This used to work, about 6-8 months ago, and is the cause of a lot of frustration now, since I have to go to adobe.com and do a search for the page that displays my version and then see if that version is the latest available.
Flash Version: 188.8.131.521
OS Version: Debian Linux 3.2.0-4-686-pae (32-bit)
Browser: Mozilla Firefox 23.0