I'm using Xubuntu 14.04, after changing display from external screen to internal in my laptop my Firefox window get a little bit transparent.
The only one window which I set to have transparency is "xfce4-terminal 0.6.3", by it's own configuration. I didn't play with transparency of any other programs or system settings, if there is any.
The same kind of strange transparency has been before few times with Nautilus window.
Why is it happen? Where can I adjust and play with these settings of transparency, or is it just a strange bug? If so, where and how can I report this bug?
After reboot everything goes back to normal.