Can you actually make one that upgrades to HTTPS? Seems like HTTPS everywhere extension is not available on Firefox mobile.

funny idea. and i have actually found a couple cases where the webpage wouldn't work unless i had enabled this extension. but 99.99% of people would never have any reason to use this, lol.

for example, i found a couple 15+ year old japanese websites with the server configured to automatically upgrade to https if the client allows it, but where the https endpoint(?) was misconfigured and it would just return an empty page with a 200 OK response, but if you used an older browser which doesn't agree to upgrade to https (maybe due to an outdated certificate store) and view the site via http then the page would load just fine. which is a really bizarre problem, btw.

like aerosol to nasty secure HTTP.