how to edit mozilla context menus   (geekin, link)

http://forums.mozillazine.org/viewtopic.php?t=14776
I hate the "Close Other Tabs" item in context menus when you right click on a tab in Mozilla. It finally pissed me off enough (because I click it accidentally sometimes when I'm just trying to close one tab) to figure out how to remove it.

my userChrome.css:
menuitem[label="Close Other Tabs"] { display: none; }

other stuff you could put in userChrome.css (you probably don't want to delete everything...):

/*Remove Right Click ContextMenu Items*/
#context-back,
#context-bookmarklink,
#context-copyemail,
#context-sep-copyimage,
#context-sep-copylink,
#context-forward,
#context-sep-open,
#context-openlink,
#context-openlinkintab,
#context-sep-paste,
#context-sep-properties,
#context-reload,
#context-savepage,
#context-sep-selectall,
#context-viewpartialsource-mathml,
#context-viewpartialsource-selection,
#context-frame-sep,
#context-stop,
#context-sep-stop,
#context-sep-undo,
#context-viewbgimage { display: none !important }

#context-showonlythisframe,
#context-viewsource,
#context-viewinfo { display: none; }

menuitem[label="Reload Frame"],
menuitem[label="Open in New Window"],
menuitem[label="Expand"],
menuitem[label="Manage Folder"],
menuitem[label="New Folder..."],
menuitem[label="Open"],
menuitem[label="Open in New Tab"],
menuitem[label="Bookmark This Frame..."],
menuitem[label="Show Only This Frame"],
menuitem[label="Save Frame As..."],
menuitem[label="View Frame Source"],
menuitem[label="View Frame Info"],
menuitem[label="Open Frame in New Window"] { display: none; }

/* Remove menu buttons */
menu[label="File"],
menu[label="Go"],
menu[label="Edit"],
menu[label="View"],
menu[label="Tools"],
menu[label="Bookmarks Toolbar Folder"],
menu[label="Help"] { display: none !important; }

/* Remove menu items */
menuitem[label="Open Link in New Tab"],
menuitem[label="New Window"],
menuitem[label="Open File..."],
menuitem[label="Close"],
menuitem[label="Close Tab"],
menuitem[label="Close Window"],
menuitem[label="Save Page As..."],
menuitem[label="Exit"],
menuitem[label="Add to Bookmarks..."],
menuitem[label="Bookmarks Toolbar"],
menuitem[label="Open in Tabs"],
menuitem[label="JavaScript Console"],
menuitem[label="Page Info"],
menuitem[label="Page Setup..."],
menuitem[label="Print Preview"],
menuitem[label="Print..."] { display: none; }

/* Removes majority of menu separators */
menuitem + menuseparator {display: none;}

/* Removes remainder of menu separators except Bookmarks Toolbars..unknown */
menu[label="Sidebar"] + menuseparator,
menu[label="Character Coding"] + menuseparator,
menu[label="Bookmarks Toolbar Folder"] + menuseparator,
menu[label="Mozilla Firebird & Mozilla Information"] + menuseparator,
menu[label="Mozilla & Phoenix Information"] + menuseparator,
menu[label="Quick Searches"] + menuseparator,
menu[label="Middle Eastern"] + menuseparator { display: none !important; }