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When I go to one of our development sites, I get this error: Secure connection failed An error occurred during a connection to xxx.xxx.com Peer's certificate has an invalid signature (Error code: sec_error_bad_signature) . I do not have the option to add an excpetion anymore, but we used to be able to navigate there. I'm running 3.6.13.
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I'm also using Firefox 3.6.13 and had the same problem. This issue can be solved simply by changing Firefox's configuration - it's NOT necessary to install any Firefox add-ons to do this, even though internet searches will list various add-ons for fixing this problem.
This is how it's done:
- Open a new Firefox window, and type this into the address/URL:
- You'll probably see a warning that changing the config can be dangerous. Click the button to accept the warning and proceed, but BE CAREFUL from here on!
- A table will appear showing various Firefox settings ("Preference Names") and their current values.
- In the Filter box type: broswer.xul
- There should now be a shorter list of settings, including one named browser.xul.error_pages.expert_bad_cert with a value of false.
- Right-click on browser.xul.error_pages.expert_bad_cert and select Toggle. The value will change to true.
- Exit completely from Firefox (i.e. close all windows), and then restart it.
The next time you visit a secure site where there is a problem with its certificate, the certificate error page will show a button that allows the site to be added as an exception, and then you'll be able to proceed and view the site.
WARNING: If Firefox warns that there is a problem with a site's certificate, proceed only if:
a) you are 100% certain that it's safe, or
b) you accept the risks!
Certificate warnings should definitely NOT appear on any sites dealing with money/transactions, e.g. online shopping, online banking, etc.
Hope this helps!
This doesn't always seem to work. I still get the same error and there is no button to allow me to add this site as an exception I am using version 3.6.18 and followed these instructions carefully but the same error page described here comes up when I tried to access my https site.
Modified by pamjustice
I am now using v3.6.18 as well. I have just tested this again, and it's working fine. I would suggest trying the following:
- Make sure every Firefox window has been closed
- Start Firefox in Safe Mode: Click Start -> Programs -> Mozilla Firefox -> Mozilla Firefox (Safe Mode)
- Go to about:config and ensure that the value of browser.xul.error_pages.expert_bad_cert is set to true, as described above
- Close the Firefox window and reboot your computer
- Start Firefox in Safe Mode again and check the setting of browser.xul.error_pages.expert_bad_cert - hopefully it will still be true
- Try opening the https page that you want to access and see if the button to add an exception is now available
- If that works, close the Firefox window, then restart Firefox normally (i.e. not in Safe Mode) and try the https page again
Hope that helps!
Frustrating, tried all the above to no avail, but in the end after some searching found I had to import a versign certificate: https://knowledge.verisign.com/support/ssl-certificates-support/index?page=content&id=AR1514
Make sure your date and time is correct i had the same problem and thats how i fixed this