What version of the Firefox comes shipped with Zorin? I thought it was flatpak, but when I went to "show details" of the Firefox that I am running, it directed me to the Software store which showed Firefox with an "install" buttion for the only version which is flatpak so I am quite confused.
Which one, if installed, will be automatically updated by Zorin?
Firefox comes as .deb Package in Zorin over the integrated Mozilla-own Repo. Updates come with the Software Updater or - if You prefer that - with the Terminal. If it comes automatically depends on how You have set up the Settings for the Software Updater.
If You would use the Flatpak-Version, the Updates would come over the Gnome Software Center. If it would update automatically depends again on the Settings that You have made there.