User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0
Steps to reproduce:
Using Airtel in Malawi via an Android Hotspot, it seems that detectportal.firefox.com is pointing to http://10.150.35.18:6510/detectportal.firefox.com/success.txt - I see this page when clicking "Open Network Login Page".
However, this page contains nothing and no login, but it's actually a proxy for detectportal.firefox.com (or so I would assume)
Using wget, I can see that subsequent requests to detectportal.firefox.com are not redirected.
I assume it's because the very first request is redirecting to this page, however it's impossible to reproduce in subsequent requests. However, periodically, the "Open Network Login Page" is displayed in ALL tabs and does not go away when clicking "X". Instead it shows up again.
- The "Open Login Page" should stop displaying after dismissing the prompt the first time.
- Since there is no login, the portal detection should be able to detect that there is this odd proxy that just echoes back the intended success message.