I'm not able to open any HTTP website on firefox (desktop and mobile) and it started about 2 months ago. So, is HTTP traffic not allowed anymore? I'm able to access HTTP over chrome, edge and safari, but firefox (regular and developer edition and ios version) are not working. It keeps loading for about 5 minutes then I see "ns_error_net_reset" in the console network tab.

also, https-only-mode is set to "don't enable" in the settings