How to remove navigation controls from Firefox right click menu?
Solution 1:
AFAIK, there is no built-in method of doing it. However you can use one of the addons. Try using Menu Editor. The name of the tool is pretty self explanatory. Does what it says - allows you to edit context menu.
Solution 2:
You can also use the Classic Theme Restorer add-on to replace the context menu icons with labels:
Solution 3:
Add to Stylish:
#context-navigation,
#context-sep-navigation {
display:none !important;
}
source: http://forums.mozillazine.org/viewtopic.php?f=7&t=2865005