firefox with red word - "menuitem"

Recently, I updated my firefox and found there's a red word "menuitem" below my status bar.
After googling this problem, this is because of typo in Java SE 6.
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A simple solution is

1. GO TO your mozilla firefox installation folder
2. Find chrome.manifest in extensions/{CAFEEFAC-0016-0000-0000-ABCDEFFEDCBA}
3. Change chrome/locale/zh_TW/ffjcext/ to chrome/locale/zh-TW/ffjcext/
4. Restart your firefox.

Now you'll find the god damn "menuitem" is disappeared !