Thank you!First of all: why are you trying to make your own sigpatches? There are premade sigpatches around. Since you are german, this site may be of help (https://wiidatabase.de/switch-downloads/hacks/signatur-patches/)
Secondary, as I havent used the script before, I assume that the firmware folder is the folder containing the official Nintendo firmware, like the one required by daybreak. You can either dump that one using your own switch or find it in the dark corners of the web (no link for that one, as it would be against the forum rules)
Darthst*****'s site has the firmware files. You are going to need them at some point to update your CFW NAND anyway. That sig patch tool can be useful if a new firmware was just released and nobody has posted patches for it but it's not really recommended to update your CFW NAND to the latest version anyway as there are usually things that break (certain homebrew, or custom sysmodules, and the Atmosphere updates for new firmware versions can have some bugs initially that can cause issues with other things as well) so you're probably never going to need it.Thank you!
Ok, thank you.Darthst*****'s site has the firmware files. You are going to need them at some point to update your CFW NAND anyway. That sig patch tool can be useful if a new firmware was just released and nobody has posted patches for it but it's not really recommended to update your CFW NAND to the latest version anyway as there are usually things that break (certain homebrew, or custom sysmodules, and the Atmosphere updates for new firmware versions can have some bugs initially that can cause issues with other things as well) so you're probably never going to need it.

Firmware refers to Nintendo Switch firmware. Atmosphere is a CFW, not a firmware.I tried using the sigpatches maker script and it asks me for a firmware folder. What folder? I tried the atmosphere folder but it doesnt accept that. Please help.