Use a tool like 7-Zip or WinRAR to see the internal files, which include:
Modifying firmware carries a high risk of "bricking" your device. If the bootloader detects a modified file without the proper exploits in place, the device will enter a Recovery Loop or DFU mode. Always back up your data and ensure you have a way to restore to a clean, official version of iOS before you begin. modify ipsw file