Bitfunder is using certificates issued to cloudflare, their CDN provider. Interestingly enough, cloudflare seems to reuse the same certificates and just add SANs (Subject Alternative Names). Some of their customers are listed below. Nothing like being on the same service as eroids.com and tripsareforjerks.com
Anyway, I'd suggest using a different browser and not disabling OCSP verification. Let bitfunder work out the issue with cloudflare, who is the one that has the problem since it's their cert.
DNS Name=ssl3952.cloudflare.com
DNS Name=ar4spam.com
DNS Name=0daymp3.com
DNS Name=*.tugg.com
DNS Name=*.generationamerica.org
DNS Name=*.tripsareforjerks.com
DNS Name=roman-numerals.org
DNS Name=*.eroids.com
DNS Name=*.katiehopkins.co.uk
DNS Name=generationamerica.org
DNS Name=brownstonehighschool.com
DNS Name=bitfunder.com
DNS Name=*.data-slimspots.com
DNS Name=*.roman-numerals.org
DNS Name=eroids.com
DNS Name=katiehopkins.co.uk
DNS Name=*.0daymp3.com
DNS Name=*.lifetimepaidhourly.com
DNS Name=lifetimepaidhourly.com
DNS Name=*.bitfunder.com
DNS Name=data-slimspots.com
DNS Name=*.ar4spam.com
DNS Name=*.brownstonehighschool.com
DNS Name=tripsareforjerks.com
DNS Name=gcflearnfree.org
DNS Name=*.gcflearnfree.org
DNS Name=*.khoc.co
DNS Name=tugg.com
DNS Name=khoc.co
DNS Name=quia.com
DNS Name=*.quia.com