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Testing conducted by Apple in September 2022 using JetStream 2.1, MotionMark 1.2, and Speedometer 2.1 performance benchmarks. Live Text photo search is available in English, Chinese, French, Italian, German, Japanese, Korean, Portuguese, Spanish, and Ukrainian. Web image search is available in German (Germany), English (Australia, Canada, India, Singapore, UK, U.S.), Spanish (Spain), French (France), and Japanese (Japan). Available in English (Australia, Canada, India, Singapore, UK, and U.S.). Select the duration under the Composing setting. Undo send is available for up to 30 seconds after sending. Safari will let you go through with the download if you ignore all the warnings. Security: While other browsers will warn you if you land on a suspicious website, Firefox will actually block downloads it deems malicious. Firefox allows you to make some of these tweaks. You can't re-arrange toolbars, or make other adjustments to your tastes. Customizability: One feature Safari lacks, due to some design decisions by Apple, is the ability to customize the interface. But if there's a website that just won't work right for you in Safari, the Quantum rendering engine from Mozilla may iron things out for you.
Compatibility: In terms of compatibility, both Firefox and Safari (and Chrome, for that matter) are pretty compliant with web standards. Privacy: Firefox's private browsing feature goes beyond just not recording your history, and will actually prevent websites from tracking you. If freedom and privacy are important to you, Firefox's development process is more transparent, and there isn't a for-profit company making decisions about it. Freedom: The Mozilla Corporation operates as a not-for-profit, and Firefox itself is open source software. It also has a larger portion of the market (second only to Chrome), so developers are more likely to consider Firefox for their extensions than Safari. One example is extensions: the Firefox extension library has been around for longer, and likely has a wider selection of add-ons. While both are mature products, Firefox may have an upper hand in some areas.
Maturity: Firefox has been around longer than Safari.