detectportal.firefox.com problem

Sunnyday

Hi all,

i'm aware of the detectportal.firefox.com issue when firefox attempts to check if it needs to log into a captive portal upon start.

I've just been googling around and discovered it - however my problem is that my logs on open dns are showing this but none of the machines/phones here are running firefox

DH and i checked all the phones etc yesterday and nothing that we have has firefox installed. We also changed the wifi password as a precaution but this morning the detectportal.firefox.com is showing up on the domains list again when i log into open dns.

Does anyone have any ideas what could be causing this?

The only browsers installed are Microsoft edge,silk,chrome and dolphin.

Thanks
SD