Generally no — we don't depend on ads to render. Some download flows may flicker if a 3rd-party script gets blocked; turn off the blocker for our domain.
If you're hot-linking our images, please host them on your own server. Hot-linking from external domains is discouraged for performance and reliability.
All our pages use a valid Let's Encrypt cert. If you see a warning, the proxy/firewall on your network is likely re-signing the connection. Check with IT.