Neither desktop firefox nor chrome seem to do this by default, at least on my Mac (actually I think I'm wrong about Firefox on desktop as well, thanks to a guestbook signer!). Maybe it's a Firefox mobile thing, rather than a modernity thing?

>for the price of a free Let's Encrypt cert you can deliver much better UX

I'm going to get around to it, I promise haha.

Btw if anyone does visit the site, please do sign my guestbook: http://darigo.su/33chan (but be warned, a MITM might intercept and alter your comment!!)