Use Ctrl + Tab to switch to the next tab
Use Ctrl + Shift + Tab to switch to the previous tab
Use Alt + 1 through Alt + 8 to switch to a specific tab
Use Alt + 9 to switch to the last tab
On Mac, use Command + Option + Right Arrow to switch to the next tab
On Mac, use Command + Option + Left Arrow to switch to the previous tab
On Mac, use Command + 1 through Command + 8 to switch to a specific tab
On Mac, use Command + 9 to switch to the last tab