When you have a version that is below the latest one (official FW), you will be prompted to upgrade every time you open the browser. So in your case, it's not an error or anything, you won't be able to use the browser until you upgrade. As far as I know, at least.so when we get the messages " you need to updade your system to use the broswer " that means what?
As said above, menuhax stops working randomly for no reason. I've set it up so many times for the L trigger (I'm trying the autoboot option this time) and at some point, I'll turn on my 3DS and it doesn't work. I go to settings, exit, doesn't work.if you are on 9.2, just use menuhax if you can.
And here I am, having to go through browserhax again for the 20th time. Back when 10.3 happened it was np as browserhax was very stable, but now, fuck that shit.