Once you've downloaded the BIOS file, follow these steps to install it:
: The official firmware is free and safe to download from PlayStation's own support pages. Official Setup Guide for RPCS3 Ps3 Emulator Bios V1 1.7 Download Fixed
Implementation notes (brief)
The search term "Ps3 Emulator Bios V1 1.7 Download Fixed" is frequently used by "clickbait" sites. Be wary of downloads that: Are contained in files. Ask you to complete a survey before downloading. Once you've downloaded the BIOS file, follow these