In 2023 it became absolete to show "https://" to every single page user visits, because the majority of websites has long shifted to using https protocol by default. Moreover, recent versions of Firefox force any website to use https protocol by default anyway.
However, Firefox is probably the only one left amongst all the major modern browsers showing "https://" prefix for every single page — which not only makes no practical sense nowadays, but also takes users attention away from the actual domain name, potentially making them easier victims for scammers.
There exists browser.urlbar.trimURLs config flag, enabled by default, but due to the old bug it hides only obsolete "http://" protocol prefix — which, considering modern security standards, should be always visible and emphasized instead.