These are our current web browser recommendations and settings. We recommend keeping extensions to a minimum: they have privileged access within your browser, require you to trust the developer, can make you [stand out](https://en.wikipedia.org/wiki/Device_fingerprint#Browser_fingerprint), and [weaken](https://groups.google.com/a/chromium.org/g/chromium-extensions/c/0ei-UCHNm34/m/lDaXwQhzBAAJ) site isolation.
On Android, Mozilla's engine [GeckoView](https://mozilla.github.io/geckoview/) has yet to support [site isolation](https://hacks.mozilla.org/2021/05/introducing-firefox-new-site-isolation-security-architecture) or enable [isolatedProcess](https://bugzilla.mozilla.org/show_bug.cgi?id=1565196). Firefox on Android also doesn't yet have [HTTPS-Only mode](https://github.com/mozilla-mobile/fenix/issues/16952#issuecomment-907960218) built-in. We do not recommend Firefox or any Gecko based browsers at this time.
On iOS all web browsers use [WKWebView](https://developer.apple.com/documentation/webkit/wkwebview), so all browsers on the App Store are essentially Safari under the hood.