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Why won't Firefox let me add an exception?

Posted

Firefox tells me that a site has an invalid security certificate, which I know. It asks if I want to Add an Exception and I click to add one. It pops up the Add Security Exception window and that window tells me that this site has a valid certificate and there is no need to add an exception; but I DO need to add an exception and it won't do it for me. Why? I am working in a secure test lab and use Firefox to login to our systems under test. Each time we change or add hardware we must add exceptions to login to a system. I have done this for years with Firefox but now Firefox 4 seems confused. We now need to use EI, which I would rather not.

Chosen solution

I was able to fix this on one machine by clearing my recent history through the Options dialog. On a second occasion, I was able to rule out "Browsing & Download History" and "Form & Search History", so I can say at this point that the problem can be fixed by clearing one or more of Cookies, Cache, "Active Logons", or "Site Preferences".

Oh, in all cases, I selected "Everything" for the time period to clear.

Read this answer in context 8

Additional System Details

Sites Affected

http://

Installed Plug-ins

  • Yahoo! activeX Plug-in Bridge
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.0"
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Shockwave Flash 10.2 r152
  • Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • 4.0.50917.0
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object

Application

  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

More Information

I can't give you the URL of the affected sites. It's a secure lab.

chingon27 0 solutions 2 answers

I'm having a same problem where firefox complains about the self-signed cert but then when you click on view certificate, it says it's fine. I have an old self-signed cert that was expired which didn't seem to bother firefox until recently. I even tried issues a new valid cert and chrome and IE can see the new cert (new expiration dates) but firefox still gives me the "this connection is untrusted message". Then when I try to view the cert to add an exception it says it fine. One thing I noticed was that view cert in FF still shows the old cert expiration dates, whereas in chrome and IE the new cert shows up.

I have tried deleting the certs out of the certificate manager and adding the FF exception again but it didn't work. I even used IE to install the self-signed root cert again. IE and chrome will now open as a trusted page but FF still has the "this connection is untrusted" -> view -> cert is valid message.

I'm going to try a few of the suggestions above hopefully something will reset FF's cert exception/cache or something.

Thanks

chingon27 0 solutions 2 answers

I overinstalled FF 7.0 and FF 6.0.2 but it didn't help. I said heck with it and created a new profile and copied my profile over from a working machine. It's working ok now. upgraded back to FF 7.0.1

elangeland 1 solutions 5 answers

Chosen Solution

I was able to fix this on one machine by clearing my recent history through the Options dialog. On a second occasion, I was able to rule out "Browsing & Download History" and "Form & Search History", so I can say at this point that the problem can be fixed by clearing one or more of Cookies, Cache, "Active Logons", or "Site Preferences".

Oh, in all cases, I selected "Everything" for the time period to clear.