Fast, small footprint, highly battery life friendly. Bunch of extensions. Extensions support on desktop and mobile. Trustworthy repository of extensions. Special ad-blocking extensions API that delivers high performance and does not require extensions access to content of the page. Tab-groups out-of-the-box. Read later feature that is synchronised across devices out of the box, no third party service required. Bunch of privacy protecting features. Apple's hide-my-email thingy built-in.