Stop Firefox from Following Light and Dark App Mode in Windows 10

Mozilla yesterday released Mozilla Firefox 63. Starting with this version, the browser follows the system app theme. If you set the 'Dark' theme as your system and app theme in Windows 10, Firefox will automatically apply the appropriate built-in theme. If you are not happy with this behavior, here is how to disable it.

Disable Ctrl+Tab Thumbnail Previews in Firefox

Starting in Firefox 63, pressing Ctrl + Tab opens a new dialog that reminds of the Alt + Tab dialog of Windows. It shows thumbnail previews of all open tabs. This feature is enabled for users with a clean or new profile. If you are not happy with this change, here is how to restore the classic way of switching between tabs with the Ctrl + Tab shortcut keys.

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