Internet Explorer versions 7 and later on Windows Vista and later Windows versions supports OCSP checking.
For details about OCSP and CRL, go to https://blogs.msdn.microsoft.com/ieinternals/2011/04/07/understanding-certificate-revocation-checks/.
Firefox supports OCSP. It is enabled by default.
To review the setting:
- In a Firefox browser window, open a new tab, type about:config in the address bar, and press Enter.
- Search for Security.OCSP.
The default value for Security.OCSP.enabled is 1 = enabled.
As of Firefox 28, CRL is deprecated in favor of OCSP.
In the Chrome browser, OCSP checks and CRL are disabled by default. Chromes uses its own update mechanism for certificate checks.