I like to group all of my Firefox windows together; however, when reselecting that group, I find that the Firefox window will not take focus.  Basically I can't click or type anything.  To workaround this problem, I select a different Firefox window in the group and then switch back to the first window.  After doing this, I am able to successfully use the first Firefox window until I switch focus after which I need to repeat the process again.

Is anyone else having this problem?

Thanks!