I wish libui-ng or even a direct minimalist native controls appeared, but most of them just recreate them and usually having accessibility issues, high DPI, etc. Slint default font looks different on Windows, so the Fluent style does not seem to use the native ones. It looks promising anyways.

Just compare it to the one from link preview.

Offline translation feature visible in Firefox 108 and later is AI powered. And works good enough for now.

It is currently maintained by paid developers again since Igalia stepped up.

They seem to mention this one: https://rss.beehiiv.com/feeds/LyzGmG4pKl.xml