Just now my Firefox 11 prompts me a dialog saying that new update is available. So I have upgraded it and new it is version 12. After this I have changed the skin to very basic like Vista Blue. While using or browsing it with, I have noticed that when I use certain software, for example a FileHippo checker. It checks the system and when it finishes, it switches back to the result screen. At this moment, I notice a momentary weird looking screen before the result screen pops up. It won’t happen all the time but with some software only. I don’t know why it is happening. When I disable the persona and set the default, everything works fine.
Bookmarks