YubNub cool keyboard commands in Firefox

1. Use Firefox (what else)

2. Go to http://yubnub.org/ (opens in new window)

3. Right-click the input box

4. Click "Add a Keyword for this Search"

5. For the Name, enter "yubnub", and for the Keyword, enter "y"

6. Press [Save]

Now you can use YubNub directly from the Firefox address bar.
For example, try typing
y gim robert redl
into your address bar.

List of more cool commands:
http://yubnub.org/kernel/most_used_commands

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Save time and mouse movements with Quick Drag.
Dragging things just a few pixels to the next whitespace area:

Drag and Drop a link = it opens the link in a new tab
Drag and Drop Highlightet Text = Google search in a new tab
Drag and Drop an image = its downloaded

https://addons.mozilla.org/en-US/firefox/addon/6912

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Save more time with mouse gestures

If you prefer using the mouse and minimizing its movements

try this cool Firefox Plugin:
http://optimoz.mozdev.org/gestures/