We launched this last week! Right now it's only available on SaaS (sentry.io), but we've been developing it in public in our main server repository (github.com/getsentry/sentry) and plan to have proper instructions for self-hosted users soon.

Hi Ben, thanks for responding. I wonder what approach are you taking in serializing DOM changes, is it similar to rrweb [1]?

[1] https://github.com/rrweb-io/rrweb/blob/master/docs/serializa...

Sentry also uses rrweb!