So many questions.
Sooner, or later than KARL3DS? What will rxMode offer that KARL3DS doesn't? Why are you choosing to go it alone instead of working with the KARL3DS guys? Does your philosophy differ to theirs, and if so how?
Will it be part of rxTools, and if so, what kind of tools would require you to boot into the home menu?
Gateway can be launched via the browser exploit if you're on 4.5, so I suspect that if you updated to 4.5 you'd be able to use this.
If not, the KARL3DS devs will support the MSET/DS profile exploit.
Time to explain, i guess.
-Since i do not know when KARL will release, i'll do on my own choice, this is another kind of project
-I offered them my help but they said they didn't need it. No problem to me, i actually continued with my project
-I personally do not care about piracy, what really matters to me is the fact right now offering free piracy to anyone can kill the console, and kill Gateway. Feel stupid to hear, yeah, but think about it, if Gateway exits the scene, there will not be progress anymore.
It supports every 3DS/3DSXL/2DS with firmare below 9.2. The choice is the web browser just becouse it's free, while CN is not.
It should not be too hard to implement mset support if you really want it. Though, i'll prefer to give support for mset for 4.x and 6.x too if i can. We'll see.
To boot it you'll just need an addictional file, not much. It's required to make this legal to share. But i promise that the setup will be noob-proof.
I cannot tell if this will be in the next rxTools release, but my goal is to implement it the most soon as possible. Also, yeah, i'll close the source of rxMode; though, rxTools will continue to be open source, so the GitHub repo will continue to be updated with all the new features, just excluding the cfw side.
As for now, rxMode can offer a FREE solution to boot emuNand, it supports the last firmware. I'm working to get region-free too.
As for signatures check, i will not disable them in the first release. It is part of my ethics about keeping the scene in life.
Until i'll disable them (and let you pirate how much you want), i can implement much cool features, like a gameshark engine, maybe screenshot and regionfree and a simple homebrew loader. My plan is to offer completely free and stable cfw, along with a complete toolset for the console (which is rxTools).
No plans for N3DS : i do not have one, i do not have plans on buying one, and this will limit the damage for Gateway and Nintendo, even though there shouldn't be any.