MenuManipulator
This extension allows you to move, edit, or create new <menu>, <menuitem>, and <menuseparator> elements within a <menubar>, <popup>, or the <tabbrowser>s context menu.
Menu Filter
Keep your menus in check by filtering out items you never use. To filter your menus, go to Menu Filter in the Add-on Manager a ...
Menu Wizard
Customize menus : Helps removing, moving and renaming menus and menu items New feature: Now you can change or disable any of u ...
FfChrome
FfChrome is a nifty little addon that slims and trims your context menu on the fly for simplicity, ease of use, easy access an ...