Custom Key Bindings 作者: Portal

This simple add-on assigns new functions to the number keys 1, 2, 3, and 5:

1: Move to the left tab
3: Move to the right tab
2: Reload the page
5: Close the current tab
It automatically disables these functions when you're in a text field or watching a video. Ideal for power users and gamers who use gaming mice with extra number keys on the side.