The best feature is being able to use Firefox extensions and thus uBlock Origin and sponsorblock on iOS. It's a little buggy but worth it for me.
Whatever you think uBlock Origin is doing; it‘s most likely just the built-in Orion ad-blocking.
While uBlock Origin can be installed in Orion on iOS just fine, it remains non-functional.
As discussed before, I find this to be false advertising by Kagi: https://news.ycombinator.com/item?id=48476448
Next best thing for me is using Safari with uBlock Origin Lite, which actually works.
> best feature is being able to use Firefox extensions
“The only browser supporting Safari, Chrome, and Firefox extensions.”
As a Firefox user, I make extensive usage of the location bar and the fact that Firefox allows you to search in history, bookmarks etc. etc.
It's so convenient to me, that I rarely use bookmarks. I keep a large history, and Firefox will efficiently allow me to find web sites I previously visited because it will effectively search in my browsing history when I type one or more words in the location bar, looking not only into the URL but also into the title.
This is something that I always miss when I try a different browsers. Also, while Mozilla Foundation has many issues, Firefox is opensource. I am looking forward into Ladybird but it will take time before it's usable. Until then, Firefox remains my favorite browser.
SponsorBlock has a native Safari/iOS extension that works fine.
Safari has UBlock Origin by the same original Raymond Hill. I've had create success with it.
https://apps.apple.com/us/app/ublock-origin-lite/id674534269...
You can also do that with reynard [0], and eventually firefox itself [1], if you just move to the EU or Japan.
Or switch to android, an operating system that didn't need government intervention to let you install a browser engine.
[0]: https://github.com/minh-ton/reynard-browser
[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1882872