I recently read A blog shortcut-keys which had some cool shortcuts out of which i liked these shortcuts for Mozilla Firefox.

It will be helpful for heavy Firefox users as this will save time.

[Ctrl] + [Enter]
- Completes .COM Address
[Shift] + [Enter]
- Completes .NET Address
[Ctrl] + [Shift] + [Enter]
- Completes .ORG Address
[Delete]
- Delete Autocomplete Entry
Miscellaneous Shortcut Keys
[F11]
- Full Screen
[Alt] + [D] ( or ) [Ctrl] + [L]
- Select Location ( Address ) Bar
Select Search Engines
( When Search Engine is Focused )
[Alt] + [Up Arrow]
[Alt] + [Down Arrow]
[F4]

[Ctrl] + [W] , [Ctrl] + [F4]
- Close the current Tab
[Ctrl] + [Shift] + [W] , [Alt] + [F4]
- Close Current Window
[Ctrl] + [Left Arrow] , [Ctrl] + [Up Arrow]
- Move Current Tab Left
[Ctrl] + [Right Arrow] , [Ctrl] + [Down Arrow]
- Move Current Tab Right
[Ctrl] + [Home]
- Move Current Tab to Beginning
[Ctrl] + [End]
- Move Current Tab to End
[Ctrl] + [T]
- Open New Tab
[Ctrl] + [N]
- Open A New Window
[Ctrl] + [Tab] , [Ctrl] + [Page Down]
- Navigate to Next Tab
[Alt] + [Enter]
- Open Address in New Tab ( from Location or Search Bar )
[Ctrl] + [Shift] + [Tab] , [Ctrl] + [Page Up]
- Navigate to Previous Tab
[Ctrl] + [Shift] + [T]
- Undo Close Tab
[Ctrl] + [1] to [8]
- Select Tab ( 1 to 8 )
[Ctrl] + [9]
- Select Last Tab