Mozilla has ended or is ending (Mozilla issued one current update for Firefox 48) support their browser on OS X Snow Leopard through OS X 10.8 Mountain Lion
- Latest Version Of Adobe Flash Player For Mac
- Adobe Flash Player Mac Os X
- Flash Player Download For Mac Free
- Adobe Flash Player Version 31.0.0.153. By clicking the Download now button, you acknowledge that you have read and agree to the Adobe Software Licensing Agreement.
- If you installed Adobe Flash Player, but still cannot view online videos on certain websites, you need to check Adobe Flash Player on your browsers. How to set up Adobe Flash Player on various browsers. Launch Safari and go to the Apple menu bar and click Preferences.
Most Macowners will receive a message saying they have to update their Flash Player. According to Blorge, before rushing to click the update button, make sure you are not installing malware into your PC.
It will end with some last version of FF 48.
You can update to the latest FF 48 version and install the latest Adobe Flash Player.
OR
Do a search for Mozilla's Firefox ESR program. It is a slightly older version of FF (FF 45.x) and is a security update version only of FF.
Disregard all of the enterprise and educational institutional stuff.
You can download, install and run the Firefox ESR versions.
You can still use the latest Adobe Flash Player, but Mozilla is not offering anymore feature updates for FF users still on 10.6-10.8.

Only security updates until April 2017.
Your only other option for a web browser that is still supported for OS X 10.6-10.8 and later is SeaMonkey.
Do a search for the
Latest Version Of Adobe Flash Player For Mac
SeaMonkey project
Adobe Flash Player Mac Os X
I don't have any links handy.
Flash Player Download For Mac Free
Good Luck!