Windows and Linux: no profile visible or selectable; Linux - no changes applied

[LinuxOnTheDesktop]

Firefox: stable 74.0 x64
OSs: Windows 10 Pro 1909 x64; Linux Mint 19.3 x64 Cinnamon
ShadowFox used via: the patching scripts you supply (one for x64 Windows, one for x64 Linux)

On both Windows and Linux, no Firefox profile is visible or selectable. I see this:

Nevertheless, on Windows, the script worked; but on Linux it didn't. I found that on Linux but not Windows I had two profiles. So I deleted one and ran the script again. Still no dice.

PS: https://github.com/overdodactyl/ShadowFox/wiki/Getting-Started seems to be empty.

[LinuxOnTheDesktop]

Ah, the fix is here.