In 2000, the WonderSwan received a web browser supporting a subset of HTML 3.2, tables, GIF files, reading Japanese text, bookmarks, and cookies - all on a handheld competing with the Game Boy Color.
From 2004, it no longer worked due to a missing gateway server. UNTIL TODAY.
I wrote a tutorial, so you can make it work again too, if you want!
It's up on my blog: https://blog.asie.pl/2023/08/browsing-the-web-wonderswan-2023/