As far as I see in the ongoing development for 22.04 Jammy, Firefox is a Snap package.The related Deb package in apt is just a shortcut/link to the that snap version.
I prefer my installation not to be from snap packages, since I find them too much 'Ubuntu-specific'.
Are there alternative ways to install Firefox on Jammy?
My favourite option would be an Apt repository or PPA. I will test the Flatpak version with my test virtual machine in the meantime.