Diễn đàn hỗ trợ Firefox

I usually watch videos on Firefox on Stan - https://www.stan.com.au/account/login - with no problem on Debian. Just wondering if this is a fault with Firefox on FreeBSD, so I know where to go looking for the problem. Other outlets have sub par performance, also, such as YouTube, where the video comes up but plays like it's operating at one frame/5 seconds, with no sound. Thanking you for any time and trouble.

Greetings. I am on Ubuntu Linux OS. Trying to run WhatsApp, I only have a web based option. Messaging, photos, works well, but no Audio. Desktop Speakers and Mic are ON (tested). No "speaker tab" on Firefox. Help!