[loso]

I had fun using it but got a server error when I got to the loading audio portion of the lesson. It said the answer was correct but to try again. Overall I like where they are going with this. I just started on the path of HTML5 game making a few months ago so hopefully this can fill in some holes I may have.

[myth_drannon]

They have numerous Firefox problems, use Chrome for quizzes.

[gaoshan]

Even Chrome has issues. I've had one answer where it said I failed so I reloaded and it said I now passed. I changed nothing. In another case the tests failed when everything looked correct so I commented out one of the methods and then it said I passed... specifically passing the test that checked for the function that I had commented out! Seems like there is some flakiness with their system.

[krapp]

I've never even been able to get this site or Coursera to work with Firefox. It's extremely aggravating.