I have sec_error_bad_signature trying to open some Web sites

When I try to open some Web sites, or connect to address secure (wttps) I get sec_error_bad_signature.

Clear the cache and cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > advanced > network > content caching Web: 'clear now '.

'Delete Cookies' sites causing problems:

  • Tools > Options > privacy > Cookies: "show the Cookies".

Try renaming the file cert8.db in the Firefox profile folder in cert8.db.old or remove the cert8.db file to remove the intermediate certificates that Firefox has stored.

If it helped to solve the problem, then you can delete the renamed file cert8.db.old.
Otherwise you can rename (or copy) the file cert8.db.old to cert8.db to restore previous intermediary certificates.
Firefox automatically records the intermediate certificates when you visit Web sites that send such a certificate.

If that didn't help then remove or rename secmod.db (secmod.db.old) as well.

You can use this button to go to the Firefox profile folder:

  • Help > troubleshooting information > profile directory: see file

Tags: Firefox

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