I'm using Mozilla Firefox for Ubuntu(version - 39.0) I want to change the quit short-cut which is currently Ctrl+Q.. To some other keys, because sometime while closing tabs with Ctrl+W., I accidentally close my firefox.

How can I change it in my system? Is there any way to do it?


Firefox offers no built-in editor for key bindings.

I have successfully used the Customizable Shortcuts extension which allows you to disable Ctrl+Q

Keybinder is based on the (discontinued) Customizable Shortcuts add-on by Tim Taubert.

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    keybinder appears to be a successor to the discontinued Customizable Shortcuts: addons.mozilla.org/firefox/addon/keybinder – Dror S. Aug 2 '16 at 9:29
  • Keybinder works for me as well. – Damian Yerrick Dec 25 '16 at 21:33
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    Check that: Keybinder will stop working permanently as of Firefox 57 per a note posted to the front page of the official repository. – Damian Yerrick Aug 30 '17 at 1:34
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    Do you know of a solution for FF >= 57? – kralyk Nov 16 '17 at 13:17
  • Any solutions nor 2018? Customizable Shortcuts is disappeared. – cqcn1991 May 21 '18 at 12:40

To disable the shortcut without installing extensions:

  1. Type about:config in the address bar
  2. Type browser.showQuitWarning in the search field
  3. Change the value to true
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    It does not work when you use the feature "Show my windows and tabs from last time" - source bugzilla – user875397 Feb 22 '18 at 16:48
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    This solution is the only one that actually works for the latest Firefox Quantum (suggested extensions are not compatible or are discontinued) – Hamman Samuel Apr 21 '18 at 2:12

Firefox does not allow changing shortcut keys out of the box (not even in About:config).

As far as I know, you have two options:

  • For only disabling ctrl+q, you can use the very simple Disable ctrl-q extension.

  • For customizing other shortcuts, including ctrl+q, you can install Menu Wizard. To use it, access Tools->Menu Wizard and click the keyboard icon on the top right (in LTR layout) to display the list of shortcuts and select a new one.

Note: the Customizable Shortcuts extension mentioned in the previous answer was discontinued and removed by its author (although the source code can still be found on github). Edit 2016-08-02: the add-on keybinder seems to be a successor to Customizable Shortcuts, although I haven't tried it personally.

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  • I tried Ctrl+Q and Alt+F4 for File->Exit in Menu Wizard. But FF ignores these shortcuts and does not quit. I tried Key Binder, but this add-on does not show Quit or Exit in its shorcut list. – Aleksey F. Jun 27 '16 at 8:11
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    I'm slightly confused by this statement - those shortcuts are Firefox's default, and this questions was discussing how to disable them. You don't need to do anything to enable them, AFAIK... – Dror S. Jun 27 '16 at 9:01
  • The "Exit" action is really absent in FF 47.0. When I sent a screenshot, Gregorio Litenstein, the developer of Keybinder, pointed me out to this add-on. Only after installing it, the "Exit" action appears in the "Other" category of Keybinder. – Aleksey F. Jun 28 '16 at 8:51

I use Xubuntu, but plain Ubuntu probably has a similar function. Because Firefox itself does not allow to change the Ctrl-Q shortcut, I decided to steal that key combination away from Firefox.

The system gets keystrokes before applications do, so I used the Settings/Keyboard/Application shortcuts to define Ctrl-Q to start some non obtrusive application. I chose the Whisker application menu, but pick whatever. And look: even when Firefox has focus, Ctrl-Q does not reach it.

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  • This blocks ctl-Q, but doesn't provide an alternative. – Adam Mar 22 '17 at 21:05

On Linux with Firefox Quantum, there is currently a bug that prevents extensions and explicit configuration from changing a builtin shortcut such as ctrl-Q. A workaround is to block it at the system level by e.g. installing the script from https://github.com/sasawat/firefox-ctrl-q-workaround and assigning it as the action of ctrl-Q as a global shortcut.

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In the electrolysis era I have come to rely on menu wizard to modify existing firefox hotkeys. It is a bit overkill since it also changes menu items, but seems to work well and is compatible.

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