@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

menuitem[label="Reload All Tabs"] {display: none;}
menuitem[label="Close Other Tabs"] {display: none;}
menuitem[label="Move to New Window"] {display: none;}
menuitem[command="Browser:BookmarkAllTabs"] { display: none !important }

menuitem#context-sendpage, 
menuitem#context-sendlink, 
menuitem#context-sendimage,
menuitem#menu_sendLink {
display:none !important;
}

#context-openlink {display: none !important;}