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Full Version: What is Firefox request to and similar
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When I test speed in Firefox, there are some strange requests tied with SSL certificate at the beginning of the waterfall:

But it isn't always present in waterfall. For example site (Comodo is cert issuer) has no such request:

May somebody explain me what it is? Can I somehow reduce these requests? Why chrome doesn't do such requests?
It's the check as to whether a certificate has been revoked or not - Online Certificate Status Protocol or OCSP for short

Different browsers have different rules as to if and when they check them.

A technique called OCSP Stapling will remove them, which needs to be configured for the root domain on your server, third-parties need to be configured on their own servers / CDNs
That it was, so I have enabled OCSP Stapling on all my servers, thank you.
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