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

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

#main-window[stylish-url="about:addons"] #nav-bar,
#main-window[stylish-url="about:addons"] #customToolbars,
#main-window[stylish-url="about:addons"] #PersonalToolbar {
  visibility: visible !important }