CodeSpace runs great on Linux! You just need to install Chrome or Chromium browser, and enable the USB device access. Details are shown below:
1. Install Chrome
There are two options here - either one will work just fine for CodeSpace:
Chromium open source browser
> sudo apt install chromium-browser
or Chrome Download from Google
go to https://www.google.com/chrome/ and download/install the package for your Linux distribution.