Ctrl as primary modifier. The complete Firefox shortcut set uses Ctrl, matching Windows. No adjustment needed when switching between the two platforms.
F-key shortcuts. F-keys work as function keys on most Linux systems without needing Fn. F5 reloads, F12 opens developer tools, same as on Windows.
Desktop environment conflicts. Some DE-level shortcuts capture key combinations before Firefox can use them. Common areas where this occurs:
- GNOME: Alt-based shortcuts and the Super key are used heavily by the shell. Alt+F4 closes windows at the system level (works as expected, it will close Firefox). A few Ctrl+Alt combinations are used for virtual terminal switching.
- KDE: KDE's global shortcuts system can capture a wider range of combinations. If a Firefox shortcut isn't responding, check KDE's Global Shortcuts settings (System Settings → Shortcuts → Global Shortcuts).
- Other DEs (XFCE, i3, etc.): Behavior varies. Check your DE's keyboard configuration if a shortcut doesn't respond.
Developer tools on Linux. Firefox developer tools are fully supported on Linux. F12 or the Ctrl-based shortcut opens the panel. Panel navigation shortcuts (Inspector, Console, Network, Debugger, etc.) are in the table above.
Reader View on Linux. Available and functions identically to Windows, accessible by shortcut when the page supports it, with keyboard controls for text display within Reader View.