To stop downloading a page, click ESC.
To go to a new location, click CTRL O.
To open a new window, click CTRL N.
To save the current page, click CTRL S.
To print the current page or active frame, click CTRL P.
To select all, click CTRL A.
To copy selection, click CTRL C.
To display a shortcut menu for a hyperlink, click SHIFT F10 key.
To close the Window, click CTRL W.
To quit Program, click ALT F4 key.

Keyboard shortcuts for Firefox

Back Alt+Left Arrow (or Backspace on Windows)
Bookmarks Ctrl+B or Ctrl+I
Bookmark This Page Ctrl+D
Caret Browsing F7
Close Tab Ctrl+W or Ctrl+F4
Close Window Ctrl+Shift+W or Alt+F4
Complete .com Address Ctrl+Enter
Complete .net Address Shift+Enter
Complete .org Address Ctrl+Shift+Enter
Copy Ctrl+C or Ctrl+Insert
Cut Ctrl+X or Shift+Del
Delete Del
Downloads Ctrl+J (Windows & Mac OS X only), Ctrl+y (Linux only
Find Again F3 or Ctrl+G
Find As You Type /
Find As You Type: links only '
Find in This Page Ctrl+F
Find Previous Shift+F3 or Shift+Ctrl+G
Force Reload (override cache) Ctrl+F5 or Ctrl+Shift+R (Command+Shift+R Mac OS X)
Forward Alt+Right Arrow (or Shift+Backspace on Windows)
Full Screen F11
History Ctrl+H
Home Alt+Home
Location Bar F6 or Ctrl+L or Alt+D
New Tab Ctrl+T
Next Frame F6
Next Tab Ctrl+Tab or Ctrl+PageDown
New Window Ctrl+N
Open File Ctrl+O
Open Location in New Tab Alt+Enter
Page Source Ctrl+U
Paste Ctrl+V or Shift+Insert
Previous Frame Shift+F6
Previous Tab Ctrl+Shift+Tab or Ctrl+PageUp
Print Ctrl+P
Redo Ctrl+Y (NOT Linux) or Ctrl+Shift+Z
Reload F5 or Ctrl+R
Save Page As Ctrl+S
Search see Find and Web Search
Select All Ctrl+A
Select Next Search Engine in Search Bar Ctrl+Down
Select Previous Search Engine in Search Bar Ctrl+Up
Select Tab [1 to 9] Ctrl+[1 to 9]
Stop Esc
Text Size: Decrease Ctrl+-
Text Size: Increase Ctrl++
Text Size: Normal Ctrl+0
Web Search Ctrl+K (or Ctrl+E on Windows & Mac OS X, or Ctrl+J on Unix)
Undo Ctrl+Z