Hi There!

Please check the solution mentioned here: http://kb.globalscape.com/KnowledgebaseArticle10522.aspx I remember someone else also suggested setting this option network.automatic-ntlm-auth.allow-proxies to false as well.

Hope this helps!

Have a good one!

Dawid

Dear Dawid

Thanks for the reply

After changing the above settings its working fine.

can i know what these two changes does in the firefox

Glad it worked for you!

network.negotiate-auth.allow-proxies Enable/disable SPNEGO by default when challenged by a proxy server.

network.automatic-ntlm-auth.allow-proxies Enable/disable automatic use of the operating system's NTLM implementation to silently authenticate the user with their Windows domain logon with proxy servers.

I am not an expert on this topic and base my reply on what I've found on the web, but you may have a look here for better understanding of how authentication works in Firefox:

https://developer.mozilla.org/en-US/docs/Integrated_Authentication

Dear Dawid,

Thanks for your valuable reply.

Thanks a lot