I am running Firefox 7.0.1 and Thunderbird 7.0.1 on Mac OS X 10.6.8.
I was exploring/nosing around their Preferences, and deleted many Authorities in the Certificate Manager.
Afterwards I started to get lots of messages from Firefox and Thunderbird that looks like this:
[domain ...:443] uses and invalid security certificate.
The certificate is not trusted because the issuer certificate is not trusted.
(Error code: sec_error_untrusted_issuer)
There are only two buttons I could click on: "View Certificate" and "Cancel". Regardless of which one I choose, the messages repeatedly pop up whenever I load a webpage.
Interestingly, I even have trouble logging onto websites (Gmail, superuser, etc.) even on other browsers on other computers. For instance, when browse to superuser.com, I am logged in. But when I ask a question, I am asked to log in, yet I can't log in with my Google Account (which I always use for stackexchange sites).
I don't even know how to troubleshoot this problem, or if there is some way to reset my system's certificate information?
This is really weird, and impedes my normal web browsing.
Answer
I looked up your error in regards to Firefox, and found this solution:
- Type the phrase about:support as a URL in the Firefox address bar.
- Click the button next to Profile Directory labeled "Open Containing Folder". That will launch Windows Explorer.
- Close Firefox.
- Locate the file cert8.db in the Windows Explorer pane you opened in step 2 and move the file to a different location (like your desktop) or rename it.
- Start Firefox again.
This will clear the file out and should resolve the errors you are getting.
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