For many of us it is not unusual to have many tens if not hundreds of tabs open in Safari. Between opening new tabs with every link you tap on in an email or other message and leaving tabs open to come back to later (instead of bookmarking them or adding them to your reading list), they can quickly add up. iOS 15 introduces a powerful new way of organizing them - Tab Groups. With Tab Groups you can organize your tabs into categories so you can quickly locate the one you're looking for, rather than searching through a hundred tabs.
The average person these days likely has many tens if not hundreds of username / password combos that are saved by (and even created by) Chrome or Safari. If you use both browsers you probably want Safari to be able to use the login info that you have stored in Chrome and vice-versa, because it can become a nuisance when you are trying to log into a service on Safari but you don't know the login because you originally created it with Chrome. Luckily macOS Catalina 10.15.4 (and above) lets you easily import your Chrome passwords to your iCloud KeyChain. Here's how to do it:
Some websites want to know the location of your iPhone. In certain instances this can be convenient, as getting a delivery to your home or finding a ride would be impossible without your location. Other times it feels like websites are spying on your device, and asking constantly to know where you are walking, talking, and shopping. Make Safari stop nagging you for your current location by denying access, or by allowing Safari to share your location when needed.
In one of its smaller but notable upgrades, macOS Big Sur lets you customize your start page even more than you could previously, giving you more options for what you can view and letting you change the background. Here's how to personalize your Safari startup page in macOS 11 Big Sur:
While iPhone and iPad have had a system-wide dark mode since iOS 13 and many third party apps have their own dark or night mode settings, there are still instances where the screen remains bright. One such instance that you've probably noticed is the Google search results in Safari, which can suddenly seem blindingly bright if you're in a dark setting and using dark mode. Before Apple developed its true dark mode people would use the "Smart Invert" and "Classic Invert" to emulate a dark mode.