I didn’t see Waterfox mentioned in the article or comments, so I’m giving it a shout out now. Firefox is still my #1 browser, which I have synced to all my critical accounts, and use very cautiously, only using a few trustwothy extensions. However, when I want to explore unfamiliar domains or experiment with lesser-known browser extensions, I’ve relied on the equally dependable Waterfox browser. It’s fast, free, and 99% the same as Firefox except it’s a completely different app so you can basically have 2 Firefoxes set up and customized for completely different roles. Between the two, I can keep Chrome frozen on my phone and off my desktop (although I have a portable Chromium on USB for emergencies).

There is a alpha client and instructions available here: https://smartdigihere.com/jellyfin-on-samsung-smart-tv/

However as stated further down the article, it’s easier to just use a web browser and access your jellyfin server that way. Login, bookmark the URL (don’t forget to include the port) and then hit full screen.

Note: You may need to tweak (server side) your transcoding and subtitle settings.