You are correct, you are not alone with this issue. @jeff75 confirmed that he is also using Firefox with Whonix workstation ( just like you are ) and he is having the same problem.
This means its not a Whonix issue. Like @Ego said, the issue is you are not using Tor Browser Bundle like you should be.
Everyone on the forum is trying to help you but its up to you weather you want to take the advice.