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

@-moz-document url("about:addons") {

#utils-autoUpdateDefault,#utils-resetAddonUpdatesToAutomatic, #utils-resetAddonUpdatesToManual, #utils-menu > menuseparator:nth-child(5), #utils-menu > menuseparator:nth-child(6), #utils-viewUpdates {
display: none !important;
}
}