The default of the pref network.http.max-connections has been increased from 30 to 256 in Firefox 6+ versions.

Try to decrease the value of the pref network.http.max-connections from 256 to 30 as used in Firefox 3 versions.

• https://support.mozilla.com/kb/Firefox+never+finishes+loading+certain+websites

The default of the pref network.http.max-connections has been increased from 30 to 256 in Firefox 6+ versions.

Try to decrease the value of the pref network.http.max-connections from 256 to 30 as used in Firefox 3 versions.

I found the network.http.max-connections value to be 48 and lowered it to 30. This did not solve the problem.

The following is the url and a notebook version of the html page that continually appears unexpectedly on one or sometimes more then one new tabs.

°Åsºþ÷/#3%C3%A1%C2%BE_u%1D%C3%AE%C3%A2%C5%92%C3%A5%C3%81%C2%AA,9K%E2%80%A1%14%C5%BDD%C2%BA%C2%A8\%15Z%C3%BA%C5%A1%C3%9A%C3%A3N%C2%8F%C2%B8%C3%9F%C2%A2%C3%A8%E2%80%99%C3%A6%03%12%C3%AF%C2%AE%C3%A6%C3%BFD%E2%80%BA%15u%E2%80%9DU%C3%9F%C2%A2

       Server not found
            
         Firefox can't find the server at www.%c2%90%c2%b0%c3%85s%c2%ba%c3%be%7f%c3%b7.com.
 
 Check the address for typing errors such as
   ww.example.com instead of
   www.example.com
 If you are unable to load any pages, check your computer's network
   connection.
 If your computer or network is protected by a firewall or proxy, make sure
   that Firefox is permitted to access the Web.

Thank you for your concern an advice so far. I am still search for an answer that might solve this problem.

Tom

Do a malware check with some malware scanning programs on the Windows computer.
You need to scan with all programs because each program detects different malware.
Make sure that you update each program to get the latest version of their databases before doing a scan.

• http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
• http://www.superantispyware.com/ - SuperAntispyware
• http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
• http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
• http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free

See also:

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

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

• https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox