When I go to Settings > Set as default browser, it opens in the wrong settings page (app settings, which on this phone is separate from default apps). I have repeatedly set Firefox as the default browser under Default Apps, but I think the app can't recognise this as it can't complete the action from the Firefox app Settings. I have a Huawai P10, I think it is Android 7. If I can't get this to work I'm going to have to stop using Firefox as links default to open in Browser and it just gets muddled. Which is frustrating cos I just spent time getting it synced up with my laptop, and I like the desktop version!