enabling opera like mouse gestures in konqueror

• Start the tool khotkeys (part of the kdebase system)
• Expand the Konqueror gestures
  
• Pick one gesture to modify, e.g. "New Tab"
• On the right, switch display to "Gestures"
• You can see the current gesture(s) as an image.
• Click on Edit
• Click on "Clear" to reset the gesture.
• Draw your new gesture 3 times (use the left mouse), you will see them in the lower left.
• If they were 3 times the same, click on OK.
• Change all gestures to ones you like and click on "Apply".

The default is to use the middle mouse button (mousewheel button).
To change that, go to "Global Settings".
Pick "Gesture Settings" and select the desired mouse button in the dropdown.
Start Konqueror and try the new settings.

have fun.