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Unable to access PowerChute Network Shutdown from OS default browser (FF31) on Oracle Linux 6.6 and Oracle Linux 6.7

Install PCNS on Oracle Linux machine and try to access the web UI from OS default browser (Firefox 31.1.0)
The following error message appears:
Error: sec_error_ca_cert_invalid

Product Line:
PowerChute Network Shutdown  4.1
OS: Oracle Linux 6.6 and Oracle Linux 6.7
Browser: Firefox 31.1.0 (Default Browser)
Build: PCNS 4.1
The value of security.use_mozillapkix_verification is false.
 1) Type "about:config" in browser’s address bar and hit Enter.
 2) Navigate to "security.use_mozillapkix_verification" and toggle the value to "true".

You will be able to access the web UI after doing this fix.
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