Hello,

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: This will cause you to lose any Extensions and some Preferences.

• Open websites will not be saved in Firefox versions lower than 25.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

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

Thank you.

Hi I have done whatever you have told me to do. I appreciate your help. I can give you feedback on the problem may be tomorrow after using it for a while. The other problem which I have is firefox does not block popups.

Firefox blocks popups by default but I would just make sure the setting is enabled before going further

To enable Firefox Pop Up blocking:

• Firefox > Options > Content > Block Pop-Up Windows

If this setting is checked, go into the exceptions menu and hit the remove all exceptions button.

For more information about this, please refer to this article:

Pop-up blocker settings, exceptions and troubleshooting

Hello, thank you for prompt reply. The "block popups" is checked, but firefox keeps opening new windows repeatedly.

The pop-up may not actually be coming from Firefox. You can determine where the pop-up is coming from by the appearance of the window.

• If you see the location bar with the little bookmark star in the pop-up window, the pop-up is coming from Firefox. Another good indication is the Firefox logo or the orange Firefox button on Windows 7 in the top left corner of the window (example of a Firefox pop-up: https://support.cdn.mozilla.net/media/uploads/images/2013-12-29-17-49-02-b296c4.png )

• If not, you may have malware on your computer that causes the pop-ups. Scan your computer for viruses and spyware. For more details, see Troubleshoot Firefox issues caused by malware.

Another thing, are these pop-ups filled with ads or just normal webpages?

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See:

• https://support.mozilla.org/kb/Server+not+found
• https://support.mozilla.org/kb/Firewalls

• https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

Do a malware check with some malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

• Malwarebytes' Anti-Malware:
  http://www.malwarebytes.org/mbam.php
• AdwCleaner:
  http://www.bleepingcomputer.com/download/adwcleaner/
  http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
• SuperAntispyware:
  http://www.superantispyware.com/
• Microsoft Safety Scanner:
  http://www.microsoft.com/security/scanner/en-us/default.aspx
• Windows Defender: Home Page:
  http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
• Spybot Search & Destroy:
  http://www.safer-networking.org/en/index.html
• Kasperky Free Security Scan:
  http://www.kaspersky.com/security-scan

You can also do a check for a rootkit infection with TDSSKiller.

• Anti-rootkit utility TDSSKiller:
  http://support.kaspersky.com/5350?el=88446

See also:

• "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked