Hello @Muqtada.husn, This appears to be some form of malware. It is most likely a plugin that has been installed in your Firefox (either intentionally or not).

If you could provide a list of your plugins and addons we can help you locate whatever is causing this issue.

Alternatively you can do it yourself. Troubleshoot Firefox issues caused by malware is a great article with further links to general issues. Yours might be a sort of the "firefox repeatedly opens empty tabs or windows" issue.

I hope this helps

-- Jørgen Juel

Sounds like something that could be caused by an add-on, particularly, an extension.

Try disabling ALL nonessential or unrecognized extensions on the Add-ons page. Either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Extensions. Then, if in doubt, disable (or if obviously bad, remove).

Usually a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.

Any improvement?

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• TDSSKiller - AntiRootkit Utility
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!