If you see CJK (Chinese/Japanese) characters on the Firefox title bar or the Windows Taskbar then that can happen if Firefox switches to UTF-16 encoding for some reason. The ''RealPlayer Browser Record Plugin'' extension (Tools > Add-ons > Extensions) has been reported to cause that issue. Be sure not to get confused with the RealPlayer plugin (Tools > Add-ons > Plugins) that plays media files. The extension adds some extra features like saving media files. You can disable/remove the ''RealPlayer Browser Record Plugin'' extension in the RealPlayer Preferences (RealPlayer: Tools > Preferences > Download & Recording) See also [[Troubleshooting extensions and themes]]