У вашего броузера проблема в совместимости с HTML5
There are a bunch of different web browsers popping up on the market lately. The main reason for this is that more than ever, users are starting to get sick of the mainstream browsers. Chrome eats up RAM (and has major privacy issues), and Firefox while getting better still needs work. That’s why the Brave browser and Vivaldi browser have been getting some attention. More at https://www.addictivetips.com/ubuntu-linux-tips/install-vivaldi-web-browser-on-linux/