Menu customization

See also: Menu Editor extension. It allows you hide the menu items as well as reorder them.

First you need to locate your profile folder. There's a subfolder called "chrome". What you need to do is edit the userChrome.css file. Create it if it does not exists.

You can hide any context menu items by adding this line to userChrome.css:

#id1, #id2 { display:none !important; }

replacing each of the identifiers #id1, #id2, ... with one of the following:

#id	label
#context-openlink	Open Link in New Window
#context-openlinkintab	Open Link in New Tab
#context-sep-open	line separator
#context-bookmarklink	Bookmark This Link...
#context-savelink	Save Link As...
#context-sendlink	Send Link...
#context-copyemail	Copy Email Address
#context-copylink	Copy Link Location
#context-sep-copylink	line separator
#context-viewimage	View Image
#context-copyimage-contents	Copy Image
#context-copyimage	Copy Image Location
#context-sep-copyimage	line separator
#context-saveimage	Save Image As...
#context-sendimage	Send Image...
#context-setWallpaper	Set As Wallpaper...
#context-blockimage	Block Images from...
#context-back	Back
#context-forward	Forward
#context-reload	Reload
#context-stop	Stop
#context-sep-stop	line separator
#context-bookmarkpage	Bookmark This Page...
#context-savepage	Save Page As...
#context-sendpage	Send Page...
#context-sep-viewbgimage	line separator
#context-viewbgimage	View Background Image
#context-undo	Undo
#context-sep-undo	line separator
#context-cut	Cut
#context-copy	Copy
#context-paste	Paste
#context-delete	Delete
#context-sep-paste	line separator
#context-selectall	Select All
#context-sep-selectall	line separator
#context-keywordfield	Add a Keyword for this Search...
#context-searchselect	Search Web for ...
#frame-sep	line separator
#frame	This Frame
#context-sep-properties	line separator
#context-viewpartialsource-selection	View Selection Source
#context-viewpartialsource-mathml	View MathML Source
#context-viewsource	View Page Source
#context-viewinfo	View Page Info
#context-metadata	Properties
#context-sep-bidi	line separator
#context-bidi-text-direction-toggle	Switch Text Direction
#context-bidi-page-direction-toggle	Switch Page Direction

Example (hides the "View Background" menu item and the horizontal line after it):

#context-viewbgimage,
#context-sep-viewbgimage {
  display: none !important;
}

Using Label

The easiest way to change the style of a menu item is using the Label property.

For example, if you want to hide the "Close Tab" menu item on the tab context menu:

menuitem[label="Close Tab"] {
    display: none !important;
}

or if you want to change the "For Internet Explorer Users" appearance on the "Help" menu:

menuitem[label="For Internet Explorer Users"] {
    text-decoration: line-through !important;
}