Beginner friendly security setup for sandboxes (asking for review)

I have written a simple application wrapping up very important applications that are likely to interact with the bad internet and get compromised (e.g. Firefox). It is fully written in Bash but Fedora/SELinux specific (currently?). If you are interested in the source code you may browse it by looking into the src/\*.sh.in files in the repo pasted below - those files are concatenated into a final script which is then installed on the system.

I have done so by using …

asking cybersecurity review sandboxes security