Another solution is installing the Firefox .deb packaged by Linux Mint, from their repository.
But it’s maybe too soon for doing so in 22.04 since actual Mint version is 20.04 based - don’t know how it affects .deb packaging and needed dependencies though…
https://mint.pkgs.org/20.3/mint-upstream-amd64/firefox_99.0.1+linuxmint1+una_amd64.deb.html