[AstralStorm]

The certificate error is of itself diagnostic of a portal rather than a proxy. The reason to use HTTP, is that some portal systems just drop TLS connections until authenticated. (Which is the correct behavior, rather than MITM.)

Opening the browser automatically is a big bug, that should be easy to fix.

[jon-wood]

It's not a bug, it is quite literally the feature, and something that also happens on Android and iOS, and I believe even on recent releases of Gnome.