I'm using FF as my primary browser so not sure about why your experience is so different.
I think I've done alright, writing an app that is configurable via json manifests, dynamically loaded settings and a plugin system everyone can contribute to.
There are of course things to improve, and almost everything listed in your post is something on my long to-do list. It's very easy to find flaws in things, but what's more difficult is to contribute to the community and improve things.
So if you are up for a challenge - open a PR and help me improve things step by step.
Thanks in advance if you decide to help out! Otherwise, comments like these make free open-source work unenticing🙏
EDIT: Fixed the empty settings (hopefully), added a remove last button on the subnets setting.
I was thinking about that sooo much, but difficult to find a free domain for networking-related projects. I think I delayed the rename by a month because I couldn't decide. So yeah, I am not the happiest about the X at the end myself, but I also don't have that much money to get a proper domain, so NetAlertX it is :)
Yeah, RPI2 is a bit underpowered. NAX also supports import from openwrt.