This extension will provide core functions for keyboard operation.
* Scrolling
* Tab Focusing
* Frame Focusing
* Finding
* Copy URL
* Clear HTTP Auth

How to use ??

1. Install KeyConfig Firefox add-on from here. At this time, it is in experimental section. So you will need to create a free account at Firefox add-ons site to download.
2. Install functions for keyconfig from here
3. Restart Firefox. Note that there are no options for this add-on
4. Go to Tools -> Keyconfig (or press Ctrl+Shift+F12)
5. Click on ‘Add a new key’

   

6. Type in ‘Go Back’ for the name and BrowserBack(); in the text field. Press OK.

   

7. Now select the new entry you just created, click inside the text box below, type in your hotkey, ‘z’ in this case and hit Apply.

   
   So you should have the entry like so:

   

8. Clicking on any other pre-existing entry in the list will show up ‘Add a new key’ button. Now create other keyboard shortcuts similarly. Below are the codes you need:

8. 	Go Forward (X):	BrowserForward();
   	Previous Tab (A):	f4kc_PrevTab();
   	Next Tab (S):	f4kc_NextTab();
   	Close Tab (C):	BrowserCloseTabOrWindow()

9. Once you are done setting up the above keys, click Close button and press OK for the alert window that says that changes take place only after a browser restart.
10. Restart Firefox and test the keys.

Note: When you visit a web page where the focus goes to a input field by default like in Google homepage, click anywhere in the empty space on the page or else your key input will be entered in the field. None of the above keys work in Gmail webpage when you have keyboard shortcuts enabled in Gmail’s settings.

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