Try setting the network.captive-portal-service.enabled preference to false using the Configuration Editor for Firefox (about:config).

Hope this helps.

Hi Wesley,

Thanks for your reply.

Even though it is not working Post changing the settings as you suggested. Almost we are struggling since 3 weeks. Kindly do the needful. Attached screenshot for your reference.

Do you still have the issue if you change your proxy setting from Auto-detect proxy settings for this network to No proxy? Unless you need the proxy.

Still i have the issue.

it is not working with default proxy as (Use system proxy settings). If i changed the proxy settings from (Use system proxy settings) to (Auto-detect proxy settings for this network) only working.

Auto-detect proxy settings for this network -------- working Use system proxy settings -------- not working

But we need the browser needs to be work on proxy (Use system proxy settings).

Hi Wesley,

Can we expect any update. More number of users affected with the Firefox issue.

Hi Wesley,

Kindly provide the update.

Does disabling your anti-virus software and firewall help? There seems to be certain internet security programs that cause this issue.

It started working while changing the proxy from

Use system proxy to auto-detect proxy.

Kindly let us know what is stopping the browser to work on use system proxy.

Is Internet Explorer set to auto-detect the proxy? It seems like maybe Firefox assumes there is no system proxy if IE is set to auto-detect (see bug 621429).

Please find the IE settings as per the attached screenshot

Kindly help us to come out of this issue. we are highly affected.

Hi Wesley,

Kindly provide the update.

You are probably experiencing the issue that I've already linked in my above reply. If the Internet Explorer settings are set to auto-detect, it appears that some people have problems with Firefox not detecting a proxy.

Kindly suggest what is the setting we need to set in firefox to be work if the proxy is Auto-detect in IE.

Issue is only in Citrix environment when users connect via Citrix.

It's an active bug (see bug 621429), so I don't believe there's anything you can do on your configuration to fix it.

You need to use the Auto-detect proxy settings for this network instead of the Use system proxy settings options. According to the bug report, that should work.

Hope this helps.