Are you using a proxy or VPN such as HotSpot Shield?

no, I am not using VPN

Do you have mcaffee site advisor installed? If so try uninstall it.

Two things. First, check your language settings. Type about:preferences#content<enter> in the address bar.

On the bottom of the page, find Languages. To its right, press the Choose button. Make sure the correct language and district is selected.

Two; Some web pages override your language settings in favor of where the site thinks you are located. What does this webpage say about your location? http://whatismyipaddress.com/

"top and across the tabs of each page there is Asian Japanese"

This issue has been previously linked to the McAfee Site Advisor extension. Try to disable it and see if the problem persists.

http://service.mcafee.com/faqdocument.aspx?id=TS100162

To disable it: Type "about:addons" in the Location bar Find the extension and click on its "Disable" button

Following up on crislevin's suggestion, you can compare the screen shots in this recent thread: Why are there Chinese characters on the top of my FF screen? They sometimes mess up all of my tabs...

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:
  http://service.mcafee.com/faqdocument.aspx?id=TS100162
• Strange characters (appears Chinese or Japanese:
  https://community.mcafee.com/thread/76071

See also these threads:

• [/questions/1034427]
• [/questions/1027393]

If this isn't your issue then please attach a screenshot

• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

• Use a compressed image type like PNG or JPG to save the screenshot
• Make sure that you do not exceed the maximum size of 1 MB