Firefox Shortcuts Key - 4
| 46 | Ctrl + Tab | Next Tab |
| 47 | Ctrl + Shift + Tab | Previous Tab |
| 48 | Ctrl + Shift + T | Undo Close Tab |
| 49 | Ctrl + Shift + N | Undo Close Window |
| 50 | Ctrl + 1to8 | Select Tab 1 to 8 |
| 51 | Ctrl + 9 | Select Last Tab |
| 52 | Shift + F3 or Ctrl + Shift + G | Find Previous |
| 53 | Ctrl + W or Ctrl + F4/td> | Close Tab |
| 54 | Ctrl + Shift + W or Alt + F4 | Close Window |
| 55 | Ctrl + M | Mute/Unmute Audio |
| 56 | Ctrl + T | New Tab |
| 57 | Ctrl + N | New Window |
| 58 | Ctrl + H | History sidebar |
| 59 | Ctrl + Shift + H | Library window |
| 60 | Ctrl + Shift + Del | Clear Recent History |
