Issue or Problem:

Clicking on clips or recordings in the SnapStream Web Interface does not start playing back automatically like it normally would after updating to the latest version of Firefox.

Cause:

Firefox started blocking autoplay by default with a recent FireFox update.

Solution:

• To set FireFox to automatically play content from your SnapStream Server gain, start by trying to play something back in SnapStream.
  
  
• When it doesn't automatically start playing, click the play icon with the slash through it to the left of the address bar.
  
  
  
• Then switch the Permissions for Autoplay sound to Allow.
• 

Additional Notes:

https://blog.mozilla.org/firefox/block-autoplay/