The McAfee SiteAdvisor extension has been reported to cause issues with text Chinese (CJK) characters appearing on tabs, so you can disable this extension until McAfee releases an update to address this issue. *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes *How to uninstall SiteAdvisor:<br>http://service.mcafee.com/faqdocument.aspx?id=TS100162 *Strange characters (appears Chinese or Japanese:<br>https://community.mcafee.com/thread/76071 ---- See also these threads: *[[/questions/1034427]] *[[/questions/1027393]]