Honestly when I first heard of Orion, i was stunned by the idea of having both chrome and firefox extensions on iOS and at the idea i would say this browser is my only choice on my iPad.
But things doesn't work out as I imagined. The default ad/tracker blocker is not fully functional at blocking even if I use custom rules, so I installed uBlock Origin. To my surprise ubo doesn't work at all. I then searched web and found in kagi community, some people complain ab this while others saying this is not reproducible. So I would say this is an occasional occurrence but for me it's just 100% because ubo literally doesn't block anything on any page. Other extensions I use daily on my desktop ff browser didn't function either, unfortunately.
I like Kagi search and the idea of warning trackers on the website and spotting promotional contents is just great. But paying $10 a month only to get results from Google, Bing and mojeek? Not really a big fan of that, I would rather give the money to mojeek to help them improve their search results instead of paying to an aggregator... And they are not even the best aggregator there, I mean there's selfhosted SearXNG which is unbeatably accurate and would only cost $2/mo on my VPS.