Description of problem:
Using Firefox 70 I get certificate errors when navigating to pages.


Version-Release number of selected component (if applicable):


How reproducible:
Open Firefox 70 on Fedora 30 and 31. Navigate to either mlb.com or nfl.com. One out of 5 times there is a certificate error.

Steps to Reproduce:
1. Opened browser and navigated to mlb.com and nfl.com.
2. Close browser and reopen - navigate to mlb.com and nfl.com
3. repeat

Actual results:
Received warning.
Warning: Potential Security Risk Ahead
SEC_ERROR_UNKNOWN_ISSUER

Certificate is from DigiCert ECC Secure Server CA

Serial Number:
0B:54:63:60:DA:9F:10:FF:FA:65:F9:D9:DF:5E:C1:25

SHA-256 Fingerprint:
A6:F9:49:FE:96:2C:EF:6A:5F:E7:43:2B:20:E4:AF:47:8F:82:AB:54:E5:69:AF:C3:C3:22:9E:0F:54:E0:FB:D0

Expected results:
The site should have been verified as secure.

Additional info:
This is an install of Firefox 70 on Fedora 30 and 31.

I uninstalled 70 and reinstalled 69. Under 69 I was unable to reproduce this error.

This error does not happen consistently. If I close the browser after receiving the error, reopen the browser the error will not be present. The error happens roughly 1 out of 5 attempts.

I compared the certificate received from an error session, a successful session and all the sessions in Firefox 69 and they were the same. Firefox 69 did not exhibit the issue in 30 attempts.