Firefox Quickly switch between search engines Shortcut

What is the keyboard shortcut for Quickly switch between search engines in Mozilla Firefox?

Keyboard Shortcut for Quickly switch between search engines in Firefox

Quickly switch between search engines Shortcut Key : Ctrl + â†‘ (or) Ctrl + â†“

Firefox offers the simple keyboard shortcut to quickly switch between search engines.
Now press, Ctrl and â†‘ keys (or) Ctrl and â†“ keys to select the search engines.