Ubuntu uses the Firefox International version by default. Other platform access to download the official website is the Chinese version, and the international version and the Chinese version of the use of two sets of account system, can not be synchronized with each other, resulting in Ubuntu Firefox can not and other platforms Firefox sync bookmarks, for this can be changed to use the Chinese version of Firefox.
Visit the Firefox China website to download the latest version of firefox:http://www.firefox.com.cn/download/
Decompression: Tar jcf firefox-latest-x86_64.tar.bz2
Pre-installed Firefox backup: sudo mv/usr/lib/firefox/usr/lib/firefox_ubuntu
Replace with Chinese version: sudo mv Firefox/usr/lib/firefox
The pre-installed Firefox is started with a script and the Chinese version is not, so copy this script here: sudo cp/usr/lib/firefox_ubuntu/firefox.sh/usr/lib/firefox/firefox.sh
When you're done, you'll be using the Chinese version to open Firefox.
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