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My internet is working but my firefox is not opening any page.


I can't even access my modem page. Something is blocking my firefox to work because google chrome and internet explorer are working fine. I am using firefox 18 and I downloaded it today itself.

Additional System Details


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11

More Information

  • Top 10 Contributor
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3198 solutions 24426 answers

Which firewall are you using?

Are you using a proxy?

Tyler Downer
  • Administrator
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1166 solutions 6649 answers

Please update to Firefox 18.0.1 (released today)

  • Top 10 Contributor
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10776 solutions 96959 answers

Helpful Reply

A possible cause is security software (firewall,anti-virus) that 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.


Question owner

I have Mcaffe antivirus and Microsoft security essentials. I used Enum process to check which firewall is blocking it and I got replie like below by enum:-

                            Windows Firewall is on

antispy process from Microsoft Windows Defender detected

I don't know from where I have to remove it, it will be great ifyou can give me steps to do for making my firefox work.

  • Top 10 Contributor
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10776 solutions 96959 answers

Does it work if you boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test?