Nope, it’s just http — and I searched the source code for the word “cache” and it does not appear. Strange.
Interesting. Now I am curious. Sometimes a website will deliberately introduce a random number in the address to prevent the browser from caching. Something like
(&.rand =IHKJHKJ*&...) Since the random number is different every time you refresh the page, the browser is fooled into thinking it’s checking a different address every time, so it reloads everything. But I doubt that’s the case here. You said the browser started caching only after you enabled ssl caching even though the site itself non ssl. Strange.