Would you please elaborate how this is different from using Safari in Private Browsing mode? If I am not mistaken Firefox Focus on iOS would still use WebKit under the hood.
Edit: I'm not being facetious or sarcastic.
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Private Browsing (regardless of browser) does not prevent online tracking. By removing trackers and ads, web pages may require less data and load faster.
It helps with preventing online tracking, since private browsing windows/tabs do not have access to your cookies.
You can use a separate Safari content blocker to prevent online tracking.
"Firefox Focus continues to operate as a Safari content blocker on iOS, and users will be able to take advantage of Tracking Protection on both Safari and Firefox Focus."
Goes beyond just a browser.
I have not used these APIs but I wonder whether it is faster to use Safari in private mode with Focus as a blocker, or using focus directly. Afaik Safari compiles the blocker rules into some binary representation and is thus able to apply them really fast. Do Webkit applications have access to similar functionality?
Safari will be faster. Focus uses UIWebView, which is markedly slower than WKWebView (UIWebView executes in-process and cannot JIT, WKWebView executes out-of-process and can JIT and is as fast as Safari).
I'm sure it is measurably faster. I doubt it is noticeably faster.
I wonder if it's possible to use this as a content blocker for Chrome on iOS.
i think only safari allows that. google lives on ads