The browser that Apple owns is the Safari web browser.
The Safari web browser is owned by Apple and is also pre installed on all Apple devices such as the Mac computer, iPad, iPhone etc.
Safari web browser has strong features like strong privacy protections, 4K video streaming and also seamless integration across Apple devices through features like Handoff and iCloud Keychain.
The Safari web browser syncs your passwords, history, bookmarks and open tabs across all of your devices via iCloud.
The Safari web browser also features intelligent Tracking Prevention, which also helps stop websites from profiling you based on your browsing activity.
The Safari web browser also uses Passkeys for safer logins and iCloud Keychain to store and autofill passwords.
And it also notifies you of suspicious websites and upgrades HTTP sites to HTTPS.
safari web browser is also known for it's speed and performance and efficiency on Apple hardware, although the performance of the Safari browser can vary.