This is not a new problem, .internal is just a new gimmick but people have been using .lan and whatnot for ages.
Certificates are a web-specific problem but there’s more to intranets than HTTPS. All devices on my network get a .lan name but not all of them run a web app.
cereals@lemmy.ml 3 months ago
You can’t install a root CA in Firefox for android.
You have to install the cert in android and set Firefox to use the android truststore.
You have to go in Firefox settings>about Firefox and tap the Firefox logo for a few times. You then have a hidden menu where you can set Firefox to not use its internal trust store.
You then have to live with a permanent warning in androids quick setting that your traffic might be captured because of the root ca you installed.
It does work, but it sucks.