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

/* Toolbar button image */
#RIL_toolbar_button,
#nav-bar #RIL_toolbar_button,
#nav-bar #isRitL-ReadSomething {
list-style-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAwUlEQVQ4jWNgGIyAn5eX9z82TJRuPz8/cWFh4f8iIiIoWEhIiHgD5OXl/6uqqqJgeXl54g1QU1P7r6+vj4JVVVXpZICpqakSRQZ4enpqUWSAr6+vtrq6OnUMCAgIuBoQEHCVLANsbW1fPnv2LOb69esJVlZW70kyQEtL68eOHTvq/p/5z/r//n+OFStW9Kipqf0hyoDg4GCNvr6+ef8//heCif3/+l8qNzd3C1EG/H/7n+//j/8qGOK//psRZQCpAAB8xoYoeqOVZwAAAABJRU5ErkJggg==") !important;}

/* Window is inactive */
window:not([active="true"]) #nav-bar #RIL_toolbar_button,
window:not([active="true"]) #nav-bar #isRitL-ReadSomething {
list-style-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAjUlEQVQ4je3OsQkEIRAF0K1BjEWwCONJDKcKqxAs5LdgYh8LgohgYjGXLedd4i0XXHAffjb/McfxkxFC4LVSSmwDSikYY5ZqrfcBay2IaKm1dh8gIjDzUiL6A3eAlBJijPeAEALmnBhjwHv/GcDM6L1fg/M84ZzbB3LOKKVcg1orUkr7QGvt7fj5o6/mAerocC1UO8PWAAAAAElFTkSuQmCC") !important;}

/* Error */
#nav-bar #isRitL-ReadSomething.isRitL-Warn {
list-style-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABaUlEQVQ4jc3RTyhDARwH8C/lwt7Ue5OS9rS8bT2HV7JcrFbvtK33erVyUpSbk5TiIjdOO7hI4SJRL8zJIg5OJhLR5E+5mCQHL0Spr5PD2htzkW99D7/D73P4/YD/mHpBEOjWirZN02yUJIk+n6+ooihWDsiyTEVRiirLcuVAMBikpmlFVRTlj4BIJBL4BmgI+2HU1qKpLBCPx9VywHA3pnkMTvZjCUCVK2AYRlsoFCoBWgPNvFqEY8bAywW8h1sQ+xGwLOvMsqwzTdPYmwCdHdAr1PEmA84OYQ1AdVkgGo3eFwqFnnw+39fRrjp3NujsgkYXeLsOfmzhXfVDdwVUVX3LZrNjPGCNruuNcyO45hH4vAHODIKPqyD3QXsUuyVAKpUKp9PpeT5RBADJi87nZZBb4MUU2CKBuUmQmyAzKH0tH+nlG1u/Zo/H0/CQGxjnec/2y17SPrQTK85e0uZp0n49GZhwPeRv8gmSpc3JNqZCRwAAAABJRU5ErkJggg==") !important;}