It says "Firefox" when I check the extensions page, so maybe that's where it manages to bring the full version from.
https://browser.kagi.com/WebExtensions-API-Support.html
The webRequest API is key, dns is used, maybe a few more.
Looks like the macOS support has improved but iOS may never happen.
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It says "Firefox" when I check the extensions page, so maybe that's where it manages to bring the full version from.