They claim to support Firefox and Chrome extensions (specifically, uBlock Origin). It's in beta. I'm surprised Apple hasn't blocked it yet, but I'd consider paying for a developer account just to install it on my phone (assuming it works).
Ive been using it on my laptop and phone. The phone version doesnt feel like it has enough polish yet. You can install it from the app store BTW, no need for a developer account. Ive been having problems with the app crashing, being unresponsive. However, the Mac version works 100% for me. I have ublock origin, bitwarden, bypass paywalls clean and sponsorblock installed. I havent noticed any issues and im very satisfied. I also really love the programable buttons feature, which let you define a button in the toolbar that runs some JS when you click on it (like a bookmarklet).
https://browser.kagi.com/
They claim to support Firefox and Chrome extensions (specifically, uBlock Origin). It's in beta. I'm surprised Apple hasn't blocked it yet, but I'd consider paying for a developer account just to install it on my phone (assuming it works).