That is the why it's keys are programmed for combo keypress - is there a reason why the mouse doesn't work for this.

ctrl+w (close tab) and ctrl+shift+w (close firefox) are very close to each other.

I was thinking it would be enough to have ctrl+shift+q to close firefox (not also ctrl+shift+w).

Using a mouse to close a tab is of course possible. But key binds are very nice to use, both for speed and comfort. Imagine not having a keyboard at all and instead use an on screen keyboard and click every single key with the mouse. It may solve something but it's not really a suitable solution.

Disable a this keybind would be really nice for my problem. Do anyone know how to? Using a mouse instead of any shortcuts is not good enough for me.

Unless you have a full touchscreen that is the only other way to close tabs opened in a Browser. Those keys are programmed into the Browser key combo settings already. So unless you find a 3rd party software to change those key-combo that is the only other way around to change the key-combo.

There are extensions for configuring keyboard shortcuts but AFAIK they don't enable you to disable Firefox shortcuts. The only way I know is to assign those shortcuts to other actions on your system. I have trained myself to use shortcuts which I set myself using the extension linked below.

https://addons.mozilla.org/en-GB/firefox/addon/select-after-closing-current/

If you close a window accidentally then you can restore that window via "History -> Recently Closed Windows".

Firefox 87+ versions have a pref to disable Ctrl+Shift+Q (Mac/Linux:Command/Ctrl+Q) to close Firefox. You need to close and restart Firefox after toggling this pref.

• about:config => browser.quitShortcut.disabled = true

Disabling the "Ctrl+Q" warning is controlled by this pref.

• about:config => browser.warnOnQuitShortcut

If you close a window accidentally then you can restore that window via "History -> Recently Closed Windows". Firefox 87+ versions have a pref to disable Ctrl+Shift+Q (Mac/Linux:Command/Ctrl+Q) to close Firefox. You need to close and restart Firefox after toggling this pref.

• about:config => browser.quitShortcut.disabled = true

Disabling the "Ctrl+Q" warning is controlled by this pref.

• about:config => browser.warnOnQuitShortcut

Thank you! This disabled the "Ctrl+Shift+Q" command.

Is there a way to disable "Ctrl+shift+W" as well?

The only way to disable the Ctrl+Shift+W shortcut to close a window is via an autoconfig,cfg file like I posted in the thread.

• /questions/1342992#answer-1426736 How to edit shortcuts

See also:

• https://www.reddit.com/r/firefox/comments/kilmm2/restore_ctrlshiftb_library_by_setting_configjs/

In your case you need to modify this line:

• let KEYS = ['key_quitApplication','key_reload'];

Change to:

• let KEYS = ['key_closeWindow'];

In case you want to include more keys, see also:

• https://searchfox.org/mozilla-release/source/browser/base/content/browser-sets.inc#line-169

You can use the autoconfig.cfg file in the Firefox installation folder to initialize (set/lock) preferences and run privileged JavaScript code.

To use Autoconfig, place two files into the Firefox installation directory.

• on Windows, they go into the same directory where Firefox is installed
• on macOS, they go into the Contents/Resources directory of the Firefox.app

The autoconfig.js file that specifies to use autoconfig.cfg is placed into the "defaults\pref" directory where the channel-prefs.js file is located.

//
pref("general.config.filename", "autoconfig.cfg");
pref("general.config.obscure_value", 0);
pref("general.config.sandbox_enabled", false); // disable sandbox to allow privileged JavaScript

The autoconfig.cfg file is placed at the top level of the Firefox directory.

• autoconfig.cfg and autoconfig.js need to start with a comment line (//)
• autoconfig.js needs to use Unix line endings (LF instead of CR/LF)

See also:

• https://support.mozilla.org/en-US/kb/customizing-firefox-using-autoconfig

Content of autoconfig.cfg

// first line in autoconfig.cfg is a comment line
try {
 let {classes:Cc, interfaces:Ci, manager:Cm, utils:Cu} = Components;
 const {Services} = Cu.import('resource://gre/modules/Services.jsm');
 function ConfigJS() { Services.obs.addObserver(this, 'chrome-document-global-created', false); }
 ConfigJS.prototype = {
  observe: function (aSubject) { aSubject.addEventListener('DOMContentLoaded', this, {once: true}); },
  handleEvent: function (aEvent) {
   let document = aEvent.originalTarget;
   let window = document.defaultView;
   let location = window.location;
   if (/^(chrome:(?!\/\/(global\/content\/commonDialog|browser\/content\/webext-panels)\.x?html)|about:(?!blank))/i.test(location.href)) {
    if (window._gBrowser) {
     let attr, elm, key, mbo;
      let KEYS = ['key_closeWindow'];
      let ATTR = ['key','modifiers','command','oncommand'];
      for (key in KEYS){
       elm = window.document.getElementById(KEYS[key]);
       if (elm) for (attr in ATTR) if (ATTR[attr] in elm.attributes) elm.removeAttribute(ATTR[attr]);
      }
    }
   }
  }
 };
 if (!Services.appinfo.inSafeMode) { new ConfigJS(); }
} catch(e) {Cu.reportError(e);}