The recent opensnitch packages seem to run well and fit on the Librem 5! Good use of scroll bars and other UI elements.
Oh also I forgot to mention what opensnitch was. It's similar to Little Snitch on Macs, but for Linux. It tracks outgoing network connections and throws up prompts so you can allow/deny them. https://github.com/evilsocket/opensnitch/
@kyle this is exactly what I was asking about on the Purism forum. Glad something like this now exists for Linux! 👍👍