@linuxfoundation I wrote a feedback to your technical support. They supported me saying no one else told them that thing was wrong, and suggested me to use Google Chrome.
@linuxfoundation Your training lesson slides are not working properly outside of chrome. The lesson is more than $200 but I can't even go to the last slide I was on. It asks if I want, but it brings an empty page. So annoying.
So many other problems in Firefox and Chromium.