Keyboard shortcut for switching between tabs in Firefox

It may sound simple, but for the newbies I believe it would be helpful.

Keyboard shortcut for switching between tabs in Firefox

Way 1:
Ctrl + Tab

Way 2:
Ctrl + PgUp (to move to Previous tab)
Ctrl + PgDn (to move to Next tab)

Way 3:
Ctrl + 2 (will switch to tab#2, similarly 1,3,... etc)