I just installed Firefox 5 and got rid of Google Chrome. My base is Windows XP sp3 in Russian. I installed Firefox in English. My wife uses Russian to email in, and I use English. When she first switched languages today, it wouldn't go back to English. In fact the icon disappeared from the toolbar. I had Firefox on this PC before, but took it off after a couple days. Chrome updated recently, and got so slow, it was worse than IE8. Do I need a plugin? Or just need to change a setting somewhere. I already set the language preference on Tools to English first, Russian second.