new-browserhax and old-browserhax is a browser exploit for system version 11.4.0-11.13.0. This can be used in conjunction with SSLoth, allowing users on version 11.13.0 and below to bypass the browser version check, and universal-otherapp, to install custom firmware on the console.
If you have updated your device to your current version using a cartridge, your Internet Browser will be inaccessible. If this is the case, you will need to update your device to the latest version through System Settings and then follow the method for the latest version.
If the browser prompts an update, it is possible that your ISP is rerouting DNS changes. Try another internet connection, or update your console to the latest version and follow Seedminer.
If the exploit was successful, you will have booted into SafeB9SInstaller
Section IV - Installing boot9strap
When prompted, input the key combo given on the top screen to install boot9strap
Once it is complete, press (A) to reboot your device
Your device should have rebooted into the Luma3DS configuration menu
If your device shuts down when you try to power it on, ensure that you have copied boot.firm from the Luma3DS .zip to the root of your SD card
Press (Start) to save and reboot
If you get an error, just continue to the next section
At this point, your console will boot to Luma3DS by default.
Luma3DS does not look any different from the normal HOME Menu. If your console has booted into the HOME Menu, it is running custom firmware.
On the next page, you will install useful homebrew applications to complete your setup.
Section VI - Restoring default DNS
Launch the System Settings application
Navigate to Internet Settings -> Connection Settings
Click on your network connection slot and navigate to Change Settings -> Next Page (right arrow) -> Proxy Settings
Set "Proxy Settings" to "No"
Click OK, then click Save
When prompted, click "Test" to perform the connection test