After I updated firefox to the latest ver. 54, I got the the strange behavior at Google.com & naver.com & daum.com When I tried to search in English input mode, there is no problem. But, when I tried to search something in Korean input mode, a strange behavior appeared. When the cursor is located in the input area, there is no problem regardless of English / Korean input mode. But, when the cursor is not located in the input area(for example, after left-click somewhere out of the input area), when I tried to input "한글", the resulting input is like "gㅏㄴ글". The first korean letter is not input correctly. Instead, the English letter which is the same keystroke with the Korean letter is input. And then rest of the inputs are Korean. I found that Chrome browser also have this problem. Please, correct this weird behavior, or let me know if there is some solution.