If anybody is interested, the original (not lite) firefox-version of uBlock Origin works just well in Orion (webkit based browser by kagi) in both iPhone and Mac. It is great to have it for safari though anyway as safari is the default browser in these platforms.
I've been using this browser for several months now. I think it's the best option if you want access the addons that are available in Firefox for Android. However, the browser is definitely still beta. I often encounter bugs, mostly with tab behavior. These are still pretty manageable though, and worth the tradeoff to me.