What this person told you was wrong, you need to use flatpak run [package id] to run flatpak apps. You can do flatpak list to see all installed flatpaks with their ids. An id looks something like org.example.app and you’d run it with flatpak run org.example.app.
Also, is it shown as being installed in Discover? If it’s not you could try just installing it again and if it is, you can try uninstalling it first. The user data for Firefox should stay intact.
You still have the binary then. Type
firefoxinto the terminal.deleted by creator
What this person told you was wrong, you need to use
flatpak run [package id]to run flatpak apps. You can doflatpak listto see all installed flatpaks with their ids. An id looks something likeorg.example.appand you’d run it withflatpak run org.example.app.Also, is it shown as being installed in Discover? If it’s not you could try just installing it again and if it is, you can try uninstalling it first. The user data for Firefox should stay intact.
And if ever unsure, look up Firefox on flathub; every app page shows the command line instructions for installing and for running it.
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its
flatpak run org.mozilla.firefox