[malandrew]

Is it possible to use the browser in https only mode, or at least have it force launch any https sites in a new incognito mode window so that you know it's http-only. Furthermore, it would be nice if you could disable all text inputs on http-only windows.

I know that I would be more likely to contact a site owner asking for https if it screamed at me everytime it happened.

It's time to ditch http for all but rare use cases, because almost 2014.

[noinsight]

Get the "HTTPS Everywhere" addon for Firefox, or, apparently, Chrome now.

[hnha]

that "only" uses a list of known https domains to force the browser to use them. It does not magically enable "https everywhere".

[jiri]

Yes, you can configure most browser to use proxy. So, I think, you can set the none proxy (or valid) for https and some invalid proxy ip for http, so you cannot connect to any http server.