BEEN USING FIREFOX FOR MANY YEARS. UP UNTIL APPROXIMATELY A MONTH AGO EVERYTHING WORKED
PERFECTLY.... SOUND AND PICTURE. I PROBABLY DID SOMETHING I SHOULDN'T OF. SURE IS A PAIN TO
WATCH A VIDEO THIS WAY. Help....
That's what I use and had what I think is the same problem based on your description. Here's what my son-in-law did to fix my unit:
Here is the sequence and change:
Tools
Options
Advanced
he un-checked "Use Hardware Acceleration when Available"
finally he closed the browser and opened a 'new' window
NOW I AM HAPPY.... Danny :+}