Hi, I recently switched to Firefox's native HTTPS-Only mode from the HTTPS Everywhere extension, and I've just made the nasty discovery that a bunch of links that had been returning 404, which I had been assuming were dead links, were actually perfectly valid pages, which Firefox had been "upgrading" to HTTPS, and then getting 404s from web servers that weren't offering them via HTTPS (but still apparently accepting connections via HTTPS). Clicking on the little lock icon and turning HTTPS-Only mode off for the website doesn't seem to have any effect - the only thing that lets me actually access these pages is turning off HTTPS-Only mode via the general Settings page (or about:config).
When the website doesn't offer HTTPS at all, then Firefox offers to connect via HTTP, after a warning, and that's fine. But having pages become completely inaccessible is intolerable - I now have to check every 404 I get by turning off HTTPS-Only mode and seeing if the page is actually there. Am I missing something here, or is HTTPS-Only mode just badly broken? https://blog.mozilla.org/security/2020/11/17/firefox-83-introduces-https-only-mode/ https://news.ycombinator.com/item?id=25121604 Celejar
