A guide for installing LibreWolf on Linux Mint 21 or 20 was published by Linux Capable.
How to Install LibreWolf on Linux Mint 21 or 20
Learn how to install LibreWolf browser on Linux Mint 21 or 20. Step-by-step guide covers importing repository, GPG key, updating, & removing browser.
How to Install LibreWolf on Linux Mint 21 or 20 - LinuxCapable