Root certificate expiration issues in Waterfox - Waterfox Support

When a root certificate used to validate websites or add-ons expires, you may see secure connection failures or add-ons being disabled.

What happens

• Certificates have expiration dates. If a widely used root certificate expires without an updated replacement, affected connections or signatures may fail.
• Symptoms can include HTTPS errors, add-ons disabled due to signature checks, or warnings on previously working sites.

What you can do

• Update Waterfox to the latest version to receive updated certificate stores and fixes.
• Check your system date and time; incorrect clocks can cause certificate validation errors.
• If the issue persists for specific sites, contact the site owner; they may need to update their certificate chain.

Related

• Error codes for secure websites
• What does “Your connection is not secure” mean?

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