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I have a PC and my Internet explorer works fine but somehow Firefox is not working (not displaying pages) - what can I do to solve


I am not sure what happened, whether it was through a Firefox update or what but I have a PC running on Windows 7 and my Internet Explorer browser works just fine but my Firefox browser (which has been working previously), no longer works...gets a page cannot be displayed type error. I am wondering what advice is there to troubleshoot and figure out the cause. Since IE is working, it cannot be proxy or connection issues but it must be a specific problem with the browser (and yes I already did uninstall and reinstall as well and that didn't work either).

I like Firefox because it is faster and generally more efficient.

Additional System Details

This happened

Every time Firefox opened

This started when...

Just a couple of days ago

Installed Plug-ins

  • Office Plugin for Netscape Navigator
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe PDF Plug-In For Firefox and Netscape "9.3.4"
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Default Plug-in
  • Shockwave Flash 10.1 r82
  • Adobe Shockwave for Director Netscape plug-in, version 11.5
  • Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers
  • 4.0.50917.0
  • Google Update


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20101012 Firefox/3.6.11

More Information

Uninstalled and reinstalled and problem still persists.

  • Moderator
1041 solutions 8840 answers

See Firefox can't load websites but other browsers can, a common cause is a firewall blocking access.

Squaller 0 solutions 10 answers


I have very similar problem. Suddenly Firefox stopped work - It was working few days after ver. 4 update. I was looking everywhere for some solution but nothing worked. - uninstalled firewall - did not worked - added full exception for Firefox into the firewall - did not worked - Firefox reinstall - did not worked - Firefox complete reinstall (registry included) - did not worked - IPv6 diseabling - did not worked - diferent proxy options (no proxy, system proxy, autodetect proxy) - did not worked - new firefox profile - did not worked - complete coockies, history... deleted - did not worked - there is only one solution which partly works - I have used public proxy addresses for Firefox but the ping is (750ms), down/up (0.8MB/0.2MB originaly (10MB/2MB) and yes I have tried different proxy server from different countries from my included. - IE is working perfectly and without proxy - other companies browser - did not worked too - only IE is working - I have used three different malware, trojans, spyware, anti-virus programs and nothing

It seems to me as hopeless situation or very clever move from Microsoft, I am forced to use IE - at least this works

Any ideas, solutions?

System Windows 7, firewall Comodo Internet security

Thanks everyone for the help