According to https://wolvic.com/en/faq/ https://wolvic.com/en/faq/ it uses GeckoView. Wolvic currently uses GeckoView. That said, as part of our experimentatio

According to https://wolvic.com/en/faq/ https://wolvic.com/en/faq/ it uses GeckoView. Wolvic currently uses GeckoView. That said, as part of our experimentation in 2021, we showed a version of Firefox Reality backed with WPE WebKit through an experimental abstraction layer. Igalia has since developed a a robust abstration layer which will allow it to be somewhat more decoupled from the underlying engine, thus allowing different engine backends. We are currently in the process of integrating a Chromium backend.