We're embeding Marketo forms in our domain. Lately we moved to SSL and I noticed that our forms are not shown in some browsers (FireFox with Ad Blockers).
Marketo SSL is very expensive. Is the only way to solve that problem is to purchase Marketo SSL? or is it possilbe to purchase SSL from another company? I read somewhere it might not be possible in 2019, is that true?
Sure, it's totally possible. You can run a Marketo LP domain via a CDN like CloudFront, which has free (locked-in) certs from its own CA. We do this whenever Marketo SSL doesn't fit the budget.