Fix Firefox accident-prone Ctrl+Q on not just Windows (force include shift modifier key) and make tabbox switchByScrolling actually work

unfuck_firefox.patch

diff --git a/browser/base/content/browser-sets.inc b/browser/base/content/browser-sets.inc
Make quit shortcut be ctrl+shift+q
--- a/browser/base/content/browser-sets.inc
+++ b/browser/base/content/browser-sets.inc
@@ -299,11 +299,7 @@
     <key id="key_sanitize_mac" command="Tools:Sanitize" keycode="VK_BACK" modifiers="accel,shift"/>
 #endif
     <key id="key_quitApplication" data-l10n-id="quit-app-shortcut"
-#ifdef XP_WIN
          modifiers="accel,shift"
-#else
-         modifiers="accel"
-#endif
 # On OS X, dark voodoo magic invokes the quit code for this key.
 # So we're not adding the attribute on OSX because of backwards/add-on compat.
 # See bug 1369909 for background on this.
diff --git a/toolkit/content/widgets/arrowscrollbox.js b/toolkit/content/widgets/arrowscrollbox.js
If switch by scrolling is enabled, also require a ctrl modifier key
--- a/toolkit/content/widgets/arrowscrollbox.js
+++ b/toolkit/content/widgets/arrowscrollbox.js
@@ -648,6 +648,11 @@
       if (!this.hasAttribute("overflowing")) {
         return;
       }
+      if (Services.prefs.getBoolPref(
+          "toolkit.tabbox.switchByScrolling",
+          false) && !event.ctrlKey) {
+        return;
+      }
 
       let doScroll = false;
       let instant;