Pretty sure Mozilla has the numbers on how many installations each OS has, so it’s probably a legitimate decision.
HOWEVER, if they want to maintain their position on Linux, I highly recommend changing the default behavior of Ctrl+Shift+C to match how it works in Helium, where it simply copies the selected content instead of opening Developer Mode, which cannot be closed again using the same keystroke.
Pretty sure Mozilla has the numbers on how many installations each OS has, so it’s probably a legitimate decision. HOWEVER, if they want to maintain their position on Linux, I highly recommend changing the default behavior of Ctrl+Shift+C to match how it works in Helium, where it simply copies the selected content instead of opening Developer Mode, which cannot be closed again using the same keystroke.