Several new features in Safari, these include a customizable start page, built-in translation, and a Privacy Report feature to let users know what trackers each webpage is using, as well as page previews and an ability to import passwords from Google Chrome.A new "Listen Now" feature in the Podcasts app.Improved predictive input for Chinese and Japanese language users.The new startup sound is lower-pitched, with a mono version for pre-T2 Macs, and a stereo variant for T2 Macs. Return of the startup sound, can be toggled via an option in System Preferences (2016 and above Macs).
MAC OS SAFARI STARTS EVEN THOUGH NOT IN STARTUP GROUP SOFTWARE
Software updates can now be done in the background.Cryptographically signed system volume.Support for iOS and iPadOS apps on Apple Silicon (Apple SoC) hardware.I guess you would have to look whether the part of the system that handles the startup keys is somehow accessible, and can be extended to invoke a command defined by you. I dont suppose stuff like this is automatically recorded anywhere.