Safari
Apple's browser. Launched 2003 for macOS, 2007 for iOS. Built on WebKit (forked from KHTML, KDE project). The only browser engine allowed on iOS until 2024.
WebKit/Safari is the third major browser engine after Chromium/Blink (Chrome, Edge, Brave) and Gecko (Firefox). Apple "tax" on iOS: all iOS browsers (Chrome, Firefox, Edge on iPhone) are forced to use WebKit. The EU Digital Markets Act 2024 forced Apple to allow third-party engines, but adoption is slow due to ecosystem friction. Safari is infamously slow with web features (push notifications came in 16.4, 2023). Criticism: "the new IE6".