Japanese script problem: at times options for Japanese alphabet on language bar disappear (although JP is shown),shortkey alt+~ that usually switches between character modes stops working,so can only type in roman characters.what can be done?
I use Japanese script which works at first when I start my computer, but after a while the options for Japanese alphabet on the language bar(hiragana,kanji,katakana etc.) disappear (although the umbrella language JP is shown and can be switched to) and the short key alt+~ that usually switches the Japanese character mode on/off stops working, so can only type in roman characters and not Japanese. I can still type in Japanese characters in other programmes, so this seems to be a Firefox problem. When I reboot it works for a while but then the problem reappears. What can be done?