Mozilla Firefox Shortcuts

Ctrl + Tab or Ctrl + PageDown: Cycle through tabs.
Ctrl + Shift + Tab or Ctrl + PageUp: Cycle through tabs in reverse.
Ctrl + (1-9): Switch to tab corresponding to number.
Ctrl + N: New window.
Ctrl + T: New tab.
Ctrl + L or Alt + D or F6: Switch focus to location bar.
Ctrl + Enter: Open location in new tab.
Shift + Enter: Open location in new window.
Ctrl + K or Ctrl + E: Switch focus to search bar.
Ctrl + O: Open a local file.
Ctrl + W: Close tab, or window if there's only one tab open.
Ctrl + Shift + W: Close window.
Ctrl + S: Save page as a local file.
Ctrl + P: Print page.
Ctrl + F or F3: Open find toolbar.
Ctrl + G or F3: Find next...
Ctrl + Shift + G or Shift + F3: Find previous...
Ctrl + B or Ctrl + I: Open Bookmarks sidebar.
Ctrl + H: Open History sidebar.
Escape: Stop loading page.
Ctrl + R or F5: Reload current page.
Ctrl + Shift + R or Ctrl + F5: Reload current page; bypass cache.
Ctrl + U: View page source.
Ctrl + D: Bookmark current page.
Ctrl + NumpadPlus or Ctrl + Equals (+/=): Increase text size.
Ctrl + NumpadMinus or Ctrl + Minus: Decrease text size.
Ctrl + Numpad0 or Ctrl + 0: Set text size to default.
Alt + Left or Backspace: Back.
Alt + Right or Shift + Backspace: Forward.
Alt + Home: Open home page.
Ctrl + M: Open new message in integrated mail client.
Ctrl + J: Open Downloads dialog.
F6: Switch to next frame. You must have selected something on the page already, e.g. by use of Tab.
Shift + F6: Switch to previous frame.
Apostrophe ('): Find link as you type.
Slash (/): Find text as you type.