I. Automatic Installation Method:
On Mozilla's FTP: http://ftp.mozilla.org/
Select the version and the corresponding operating system http://releases.mozilla.org/pub/mozilla.org/firefox/releases/, the Language Pack is under the xpi directory, find it by yourself, simplified (zh-CN.xpi)/traditional (zh-TW.xpi)
It seems that the language packs corresponding to different operating systems are no different. They are used for personal testing. You can decide on your own.
Click the link below to directly install (Simplified Chinese ):
Latest Version (latest /):
Http://releases.mozilla.org/pub/mozilla.org/firefox/releases/latest/linux-i686/xpi/zh-CN.xpi: Linux
Windows: http://releases.mozilla.org/pub/mozilla.org/firefox/releases/latest/win32/xpi/zh-CN.xpi
MacOS: http://releases.mozilla.org/pub/mozilla.org/firefox/releases/latest/mac/xpi/zh-CN.xpi
Modify the configuration at the bottom of this article.
3. Very important!
After completing the preceding two steps, enter "about: config" in the Firefox address bar and press enter, and then enter general in the filter. useragent. locale, double-click this item, and then enter "ZH-CN" in the pop-up dialog box. OK.
If you want to change to English, follow these steps and change the configuration to "En-us"
After restarting the browser, Firefox becomes the Chinese version.
Original link http://blog.csdn.net/intel80586/article/details/7678183