That about says it all. When one is running on a RHD (real hard drive) steam-powered desktop, auto updates can occur that freezes things for three or four minutes while Firefox installs the latest/greatest.
So please consider adding the latest update release date to the firefox "about Firefox" pop-up so I can check first on my other non-steam-powered device to see if I should start Firefox and go get a cuppa before continuing on the old beater.