cant boot games

[domthegreatest]

okay so i have been trying this emulator for a long time now and i never have been able to boot games and when i do it says:
E : /dev_flash/sys/external/ directory does not exist!
You should install the PS3 Firmware (Menu: Tools -> Install Firmware).
Visit https://rpcs3.net/ for Quickstart Guide and more information.
F LDR: class std::runtime_error thrown: Failed to load /dev_flash/sys/external/libfiber.sprx: Invalid stream or file not found

what do i do????

[Annie]

Can you please read what you literally just pasted there?
Install firmware is now on Boot submenu though.

[domthegreatest]

Can you please read what you literally just pasted there?
Install firmware is now on Boot submenu though.

it wouldnt show up