hello, please try to reset firefox and see if this can address the issue...

Tried the following troubleshooting items already & the issue is NOT yet resolved. Much appreciated for a quick support.

1. Reset Firefox - Didn't solve the issue 2. Restart with Add-ons disabled - Didn't solve the issue 3. I have no add-ons/ plugins which redirect all URLs to HTTPS 4. I use Symantec Endpoint Protection. But FF was working fine earlier along this tool.

Any chance you have the HTTPS Everywhere add-on installed?

No, "HTTPS Everywhere " add-on is NOT installed.

Are these addresses what you typed in, shortcuts, bookmarks? If the last two, check the properties for them.

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/

Who is the issuer of the certificates?

Issue is fixed now.

This issue comes when the Proxy server creates a dummy certificate for all HTTPS connection. By doing this, the proxy server will be able to look into the encrypted SSL/TLS traffic by impersonating the target server.

Solution: 1. In windows, Run-> certmgr.msc 2. Go to the node, "Trusted Root CertificationAuthorities" 3. Find your Organizations/ Proxy Server certificate 4. Export it. Right Click on the certificate-> All Tasks-> Export ... 5. While exporting the certificate, use the format as "Base-64 .... .cer"

Now import it to Firefox. 1. From Firefox, Options-> Advanced-> Certificates-> View Certificates 2. Navigate to "Authorities" tab 3. Click on "Import..." and import the certificate

Now, firefox will work for ALL https connections.

Great job.