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.
When this new Ctrl + Tab dialog is enabled, it also changes the order you switch between tabs. It cycles through tabs in recently used order. Here’s how to disable it and restore the classic tab switcher.
To disable Ctrl+Tab Thumbnail Previews in Firefox, do the following.
You are done.
Alternatively, you can turn this feature on or off by visiting the about:config page and changing the option
browser.ctrlTab.recentlyUsedOrder. Here is how.
about:configin the address bar. Confirm that you will be careful if a warning message appears for you.
browser.ctrlTab.recentlyUsedOrderparameter in the list below. A value data of true enables the feature. When set to False, the browser has the classic tab switching behavior.