Agreed. I've been using this for several versions already (mentioned by other commenters - dom.security.https_only_mode). Very few websites break, and they should know better (e.g. HTTPS redirects to HTTP, redirects to another HTTPS location).
I've often daydreamed of a new HN freature where non-HTTPS links have a preceeding red marker "[HTTP only]" (or similar) but never could find the correct place to write it down. Considering that Firefox is now a minority browser :( perhaps there is still usefulness in this idea?
I've often daydreamed of a new HN freature where non-HTTPS links have a preceeding red marker "[HTTP only]" (or similar) but never could find the correct place to write it down. Considering that Firefox is now a minority browser :( perhaps there is still usefulness in this idea?